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Google Ads (formerly Google AdWords) is an
online advertising Online advertising, also known as online marketing, Internet advertising, digital advertising or web advertising, is a form of marketing and advertising which uses the Internet to promote products and services to audiences and platform users. ...
platform developed by
Google Google LLC () is an American multinational technology company focusing on search engine technology, online advertising, cloud computing, computer software, quantum computing, e-commerce, artificial intelligence, and consumer electronics. ...
, where advertisers bid to display brief
advertisements Advertising is the practice and techniques employed to bring attention to a product or service. Advertising aims to put a product or service in the spotlight in hopes of drawing it attention from consumers. It is typically used to promote a ...
, service offerings, product listings, or videos to web users. It can place ads both in the results of search engines like
Google Search Google Search (also known simply as Google) is a search engine provided by Google. Handling more than 3.5 billion searches per day, it has a 92% share of the global search engine market. It is also the most-visited website in the world. The ...
(the Google Search Network) and on non-search websites, mobile apps, and videos. Services are offered under a
pay-per-click Pay-per-click (PPC) is an internet advertising model used to drive traffic to websites, in which an advertiser pays a publisher (typically a search engine, website owner, or a network of websites) when the ad is clicked. Pay-per-click is usually ...
(PPC) pricing model. Google Ads is the main source of revenue for
Alphabet Inc Alphabet Inc. is an American multinational technology conglomerate holding company headquartered in Mountain View, California. It was created through a restructuring of Google on October 2, 2015, and became the parent company of Google and se ...
, contributing US$168.6 billion in 2020.


History

Google launched AdWords in 2000. Initially, AdWords advertisers paid for the service monthly, and Google would set up and manage their campaigns. Google soon introduced the AdWords self-service portal to accommodate small businesses and those who wanted to manage their own campaigns. In 2005, Google started a campaign management service known as 'Jumpstart'. The AdWords system was initially implemented on top of the
MySQL MySQL () is an open-source relational database management system (RDBMS). Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, and "SQL", the acronym for Structured Query Language. A relational database o ...
database engine. After the system had been launched, management decided to use
Oracle An oracle is a person or agency considered to provide wise and insightful counsel or prophetic predictions, most notably including precognition of the future, inspired by deities. As such, it is a form of divination. Description The word '' ...
instead but was eventually reverted to MySQL after the system became much slower. Eventually, Google developed a custom distributed
Relational database management system A relational database is a (most commonly digital) database based on the relational model of data, as proposed by E. F. Codd in 1970. A system used to maintain relational databases is a relational database management system (RDBMS). Many relatio ...
(RDBMS) known as Google F1 specifically for the needs of the Ad business. The interface offers Spreadsheet Editing, Search Query Reports, and
conversion Conversion or convert may refer to: Arts, entertainment, and media * "Conversion" (''Doctor Who'' audio), an episode of the audio drama ''Cyberman'' * "Conversion" (''Stargate Atlantis''), an episode of the television series * "The Conversion" ...
metrics. In 2008, Google launched the Google Online Marketing Challenge, an in-class academic exercise for tertiary students. Over 8,000 students from 47 countries participated in the challenge in 2008, over 10,000 students from 58 countries took part in 2009, about 12,000 students in 2010, and almost 15,000 students from 70 countries in 2011. The challenge runs annually, roughly from January to June. In April 2013, Google announced plans to add enhanced campaigns for AdWords to aid with campaign management catered to multiple-device users. The enhanced campaigns aimed to include advanced reports about users. This move was controversial among advertisers. In July 2016, Google unveiled "Showcase Shopping" ads. With this format, retailers can choose to have a series of images that appear in search results related to various search queries and keywords. In October 2017, Google revised AdWords' daily budget caps, which were previously set at a maximum of 120% of preset daily budgets, to a maximum of 200%. This change was rolled out on the same day it was announced, prompting criticism from paid search professionals. However, Google later clarified that this change would affect only short-term campaigns of less than 30 days and that for campaigns running more than 30 days, overage charges would be refunded. On June 27, 2018, Google announced a rebranding of Google AdWords as Google Ads as of July 24, 2018. In 2018, ''
Bloomberg News Bloomberg News (originally Bloomberg Business News) is an international news agency headquartered in New York City and a division of Bloomberg L.P. Content produced by Bloomberg News is disseminated through Bloomberg Terminals, Bloomberg Televi ...
'' reported that Google had paid millions of dollars to Mastercard for its users' credit card data for advertising purposes. The deal had not been publicly announced.


Functionality

Google Ads' system is based partly on
cookies A cookie is a baked or cooked snack or dessert that is typically small, flat and sweet. It usually contains flour, sugar, egg, and some type of oil, fat, or butter. It may include other ingredients such as raisins, oats, chocolate chips, nuts ...
and partly on keywords determined by advertisers. Google uses these characteristics to place advertising copy on pages that they think might be relevant. Advertisers pay when users divert their browsing to click on the advertising copy. Adverts can be implemented locally, nationally, or internationally. Google's text advertisements mimic what the average search result looks like on Google. Image ads can be one of the several different standardized sizes as designated by the
Interactive Advertising Bureau The Interactive Advertising Bureau (IAB) is an American advertising business organization that develops industry standards, conducts research, and provides legal support for the online advertising industry. The organization represents many of th ...
(IAB). In May 2016, Google announced Expanded Text Ads, allowing 23% more text. Besides the Google search engine, advertisers also have the option of enabling their ads to show on Google's partner network, members of which receive a portion of generated income. In addition to external
search engine marketing Search engine marketing (SEM) is a form of Internet marketing that involves the promotion of websites by increasing their visibility in search engine results pages (SERPs) primarily through paid advertising. SEM may incorporate search engine opti ...
agencies and consultants, Google has its own in-house team of account managers.


Features

*The ''Keyword Planner'' provides data on Google searches and other resources to help plan advertising campaigns. *''AdWords Express'' (previously "Google Boost") is a feature aimed at small businesses that attempt to reduce the difficulty of managing ad campaigns by automatically managing keywords and ad placement. *''Google Ads Editor'' is a downloadable program that allows users to make bulk changes to ads and edit ads offline. It also allows users to see ad performance, like the dashboard. *''Google Ads Manager Accounts'' (previously "My Client Centre (MCC)") allows users to manage multiple accounts from one login and dashboard. This is most commonly used by Marketing and Advertising agencies who manage a large portfolio of client accounts. *The ''Reach Planner'' allows users to forecast the reach and extent of their video ads across
YouTube YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by ...
and Google video partners. The tool allows users to choose their audience, then recommends a combination of video ads that help reach the user's objectives and see the reach of their ads. *In addition to location and language targeting, advertisers can specify
Internet Protocol The Internet Protocol (IP) is the network layer communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet. IP h ...
(IP) addresses to be excluded. Advertisers can exclude up to 500 IP address ranges per campaign. *''Google Academy for Ads'' (previously "Google Partners", "Google AdWords Certification Program" and "Google AdWords Certification") provides a qualification to clients who pass a Google Ads Fundamentals exam and one Advanced AdWords exams on
search Searching or search may refer to: Computing technology * Search algorithm, including keyword search ** :Search algorithms * Search and optimization for problem solving in artificial intelligence * Search engine technology, software for findi ...
,
display Display may refer to: Technology * Display device, output device for presenting information, including: ** Cathode ray tube, video display that provides a quality picture, but can be very heavy and deep ** Electronic visual display, output devi ...
,
video Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media. Video was first developed for mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) syste ...
, shopping, or
mobile Mobile may refer to: Places * Mobile, Alabama, a U.S. port city * Mobile County, Alabama * Mobile, Arizona, a small town near Phoenix, U.S. * Mobile, Newfoundland and Labrador Arts, entertainment, and media Music Groups and labels * Mobile ( ...
advertising, or
Google Analytics Google Analytics is a web analytics service offered by Google that tracks and reports website traffic, currently as a platform inside the Google Marketing Platform brand. Google launched the service in November 2005 after acquiring Urchin. As o ...
. Google Partners must maintain a minimum spend threshold of US$10,000 over 90 days, with a higher spend threshold for Google Premier Partners. *''Placement-targeted advertisements'' (formerly Site-Targeted Advertisements) places adverts based on keywords, domain names, topics, and
demographic targeting Demographic targeting is a form of behavioral advertising in which advertisers target online advertisements at consumers based on demographic information. They are able to achieve this by using existing information from sources such as browser ...
preferences entered by the advertiser. If domain names are targeted, Google also provides a list of related sites for placement. Advertisers bid on a cost-per-impression (CPI/CPM) or
cost-per-click Pay-per-click (PPC) is an internet advertising model used to drive traffic to websites, in which an advertiser pays a publisher (typically a search engine, website owner, or a network of websites) when the ad is clicked. Pay-per-click is usually ...
(CPC) basis for site targeting. * ''Remarketing'' allows marketers to show advertisements to users that have previously visited their website and allows marketers to create different audience lists based on the behavior of website visitors. Remarketing Lists for Search (RLSA) via
Google Analytics Google Analytics is a web analytics service offered by Google that tracks and reports website traffic, currently as a platform inside the Google Marketing Platform brand. Google launched the service in November 2005 after acquiring Urchin. As o ...
became available in Google Ads in early June 2015, allowing for the use of standard GA remarketing lists to plan traditional text search ads. Dynamic remarketing can show past visitors the specific products or services they viewed. While common, some users may find overly overt use intrusive. *''Ad extensions'' allow advertisers to show extra information with their ads, such as a business address, phone number, links to a web page or app, prices, or sales and promotions. Google Ads may also display automated extensions such as consumer ratings when the system predicts they will improve performance. *Having granted more than $10 billion in free advertising for over 115,000 nonprofits across 51 countries since 2003, the ''Google Ad Grants'' contribute up to $10,000 per month of in-kind search advertising. *''Performance Max'', a new type of campaign, is released to provide an opportunity to advertise businesses with a single campaign across Google channels such as YouTube, Display, Search, Discover, Gmail, and Maps, instead of having to create one for each channel.


Restrictions on ad content

The "Family status" of an ad ("family safe", "non-family safe", or "adult") is set by a Google reviewer and indicates what “audiences the ad and website are appropriate for”. This affects when and where, including in which countries, an ad can appear. As of December 2010, Google AdWords decreased restrictions on sales of hard alcohol. It now allows ads that promote the sale of hard alcohol and liquor. This is an extension of a policy change that was made in December 2008, which permitted ads that promote the branding of hard alcohol and liquor. Some keywords, such as those related to hacking, are not allowed at all. From June 2007, Google banned AdWords adverts for student essay-writing services, a move which received positive feedback from universities. Google has a variety of specific keywords and categories that it prohibits that vary by type and by country. For example, use of keywords for alcohol related products are prohibited in Thailand and Turkey; keywords for gambling and casinos are prohibited in Poland; keywords for
abortion Abortion is the termination of a pregnancy by removal or expulsion of an embryo or fetus. An abortion that occurs without intervention is known as a miscarriage or "spontaneous abortion"; these occur in approximately 30% to 40% of pregn ...
services are prohibited in Russia and Ukraine; and keywords for adult related services or products are prohibited worldwide as of June 2014. In Early 2022, Google has paused all ad sales in Russia in response to the ongoing crisis in Ukraine. In March 2020, at the beginning of the Coronavirus crisis, Google blocked all face masks keywords from being eligible for ad targeting as part of a policy to prevent companies from attempting to capitalize on the pandemic.


Cost

Every time a user conducts a search on Google, Google Ads runs an auction in real time to determine which search ads are displayed on the search results page as well as the ad's position. The cost of a Google Ads campaign therefore depends on a variety of factors, including the maximum amount an advertiser is willing to
pay-per-click Pay-per-click (PPC) is an internet advertising model used to drive traffic to websites, in which an advertiser pays a publisher (typically a search engine, website owner, or a network of websites) when the ad is clicked. Pay-per-click is usually ...
the keywords being bid on, and the quality score of the ad (based on its relevance and click frequency and ad extensions). Although an advanced bidding strategy can be used to automatically reach a predefined cost-per-acquisition (CPA), this should not be confused with a fixed CPA pricing model.


Conversion tracking

In addition to tracking clicks, Google Ads provides advertisers an ability to track and report other conversions that happen after the click such as purchases, sign ups or calls. Conversion tracking is implemented by sending an identifier to the advertiser's website as a URL parameter, which is then used by advertiser to send conversions to Google Ads, allowing Google Ads to trace conversion back to the original click for reporting. Google also allows advertisers to install a pixel on their website that sends conversions to the Adwords account. This allows advertisers to target their ads to drive conversions more effectively. For most traffic, Google sends a unique identifier for each click (in a ''gclid'' parameter), allowing to determine source of conversion precisely. To comply with tracking restrictions on Apple devices, anonymized identifiers that aren't associated with specific person are used (called ''wbraid'' and ''gbraid''). Google Ads provides ability to report many of such anonymous conversions by using "modeled conversions" that combine additional customer details to deduce, which user to attribute the conversion to. Google Ads introduced enhanced conversions to make conversion measurement more accurate.


Lawsuits

Google Ads have been the subject of lawsuits relating to
trademark law A trademark (also written trade mark or trade-mark) is a type of intellectual property consisting of a recognizable sign, design, or expression that identifies products or services from a particular source and distinguishes them from othe ...
('' Google, Inc. v. Am. Blind & Wallpaper Factory'' and '' Rescuecom Corp. v. Google Inc.''), fraud (''
Goddard v. Google, Inc. ''Goddard v. Google, Inc.'', 640 F. Supp. 2d 1193 (N.D. Cal. Jul. 30, 2009), is a case in which Jenna Goddard ("Plaintiff") alleged that she and a class of similarly situated individuals were harmed by Google ("Defendant") as a result of clicking ...
''), and
click fraud Click, Klick and Klik may refer to: Airlines * Click Airways, a UAE airline * Clickair, a Spanish airline * MexicanaClick, a Mexican airline Art, entertainment, and media Fictional characters * Klick (fictional species), an alien race in the g ...
.
Overture Services, Inc. Overture (from French ''ouverture'', "opening") in music was originally the instrumental introduction to a ballet, opera, or oratorio in the 17th century. During the early Romantic era, composers such as Beethoven and Mendelssohn composed overtu ...
sued Google for
patent infringement Patent infringement is the commission of a prohibited act with respect to a patented invention without permission from the patent holder. Permission may typically be granted in the form of a license. The definition of patent infringement may v ...
in April 2002 in relation to the AdWords service. The suit was settled in 2004 after
Yahoo! Yahoo! (, styled yahoo''!'' in its logo) is an American web services provider. It is headquartered in Sunnyvale, California and operated by the namesake company Yahoo Inc., which is 90% owned by investment funds managed by Apollo Global Man ...
acquired Overture; Google agreed to issue 2.7 million shares of common stock to Yahoo! in exchange for a perpetual license under the patent. In 2006, Google settled a click fraud lawsuit for US$90 million. In May 2011, Google cancelled the AdWords advertisement purchased by a Dublin sex worker rights group named "Turn Off the Blue Light" (TOBL), claiming that it represented an "egregious violation" of company ad policy by "selling adult sexual services". However, TOBL is a nonprofit campaign for sex worker rights and is not advertising or selling adult sexual services. After TOBL members held a protest outside Google's European headquarters in Dublin and sent in written complaints, Google reviewed the group's website. Google found the website content to be advocating a political position and restored the AdWords advertisement. In June 2012, Google rejected the
Australian Sex Party The Australian Sex Party was an Australian political party founded in 2009 in response to concerns over the purported increasing influence of religion in Australian politics. The party was born out of an adult-industry lobby group, the Eros Asso ...
's ads for AdWords and sponsored search results for the July 12 by-election for the state seat of Melbourne, saying the Australian Sex Party breached its rules which prevent solicitation of donations by a website that did not display tax exempt status. Although the Australian Sex Party amended its website to display tax deductibility information, Google continued to ban the ads. The ads were reinstated on election eve after it was reported in the media that the Australian Sex Party was considering suing Google. On September 13, 2012, the Australian Sex Party lodged formal complaints against Google with the
US Department of Justice The United States Department of Justice (DOJ), also known as the Justice Department, is a federal executive department of the United States government tasked with the enforcement of federal law and administration of justice in the United State ...
and the Australian competition watchdog, accusing Google of "unlawful interference in the conduct of a state election in
Victoria Victoria most commonly refers to: * Victoria (Australia), a state of the Commonwealth of Australia * Victoria, British Columbia, provincial capital of British Columbia, Canada * Victoria (mythology), Roman goddess of Victory * Victoria, Seychelle ...
with corrupt intent" in violation of the
Foreign Corrupt Practices Act The Foreign Corrupt Practices Act of 1977 (FCPA) (, ''et seq.'') is a United States federal law that prohibits U.S. citizens and entities from bribing foreign government officials to benefit their business interests. The FCPA is applicable world ...
. In December 2019, France fined Google €150 million for advertiser suspensions on Google Ads, arguing it had "abused its dominant position by adopting opaque and difficult to understand rules" which it was then free to "interpret and modify" at its own discretion.


Controversies


Trademarked keywords

Google has come under fire for allowing AdWords advertisers to bid on trademarked keywords. In 2004, Google started allowing advertisers to bid on a wide variety of search terms in the US and Canada, including trademarks of their competitors and in May 2008 expanded this policy to the UK and Ireland. Advertisers are restricted from using other companies' trademarks in their advertisement text if the trademark has been registered with Advertising Legal Support team. In March 2010, Google was involved with a trademark infringement case involving three French companies that own
Louis Vuitton Louis Vuitton Malletier, commonly known as Louis Vuitton (, ), is a French high-end luxury fashion house and company founded in 1854 by Louis Vuitton. The label's LV monogram appears on most of its products, ranging from luxury bags and leather ...
trademarks. The lawsuit concerned if Google was responsible for advertisers purchasing keywords that violate trademark infringement. Ultimately, the Court of Justice of the European Union ruled that Google AdWords were “not a breach of EU trademark law, but that the content of some advertisements that are linked by Google keywords may well be in breach depending upon the particular facts of the case.” Additionally, in some American jurisdictions, the use of a person's name as a keyword for advertising or trade purposes without the person's consent has raised
Right to Privacy The right to privacy is an element of various legal traditions that intends to restrain governmental and private actions that threaten the privacy of individuals. Over 150 national constitutions mention the right to privacy. On 10 December 1948 ...
concerns. In 2013, the Tenth Circuit Court of Appeals held in 1''-800 Contacts, Inc. v. Lens.com, Inc.'' that online contact lens seller Lens.com did not commit
trademark infringement Trademark infringement is a violation of the exclusive rights attached to a trademark without the authorization of the trademark owner or any licensees (provided that such authorization was within the scope of the licence). Infringement may o ...
when it purchased AdWords and other search advertisements using competitor
1-800 Contacts 1-800 Contacts Inc. is an American contact lens retailer based in Draper, Utah. The brands that 1-800 Contacts use includes Johnson & Johnson Vision Care, Alcon, Bausch & Lomb and CooperVision. The company was founded as the industry's first wa ...
' federally registered 1800 CONTACTS trademark as a keyword. In August 2016, the
Federal Trade Commission The Federal Trade Commission (FTC) is an independent agency of the United States government whose principal mission is the enforcement of civil (non-criminal) antitrust law and the promotion of consumer protection. The FTC shares jurisdiction ov ...
filed an administrative complaint against 1-800 Contacts alleging that its search advertising trademark enforcement practices have unreasonably restrained competition in violation of the FTC Act. 1-800 Contacts has denied all wrongdoing and is scheduled to appear before an FTC
administrative law judge An administrative law judge (ALJ) in the United States is a judge and trier of fact who both presides over trials and adjudicates claims or disputes involving administrative law. ALJs can administer oaths, take testimony, rule on questions of evi ...
in April 2017.


IT support ban

In 2018, Google implemented a policy change which restricts the advertising of consumer technical support, including, "troubleshooting, security, virus removal, internet connectivity, online accounts (for example, password resets or login support), or software installation", Google's Director of Global Product Policy, David Graff stated that the policy was intended to "address abuse" and "fraudulent activity" from third-party technical support providers, and that a verification program for legitimate providers would be rolled out "in the coming months". This is yet to manifest, resulting in an effective ban on all IT support and repair related services on the Google Ads platform. Commentators have expressed concerns that this is an attempt by Google to stifle consumers'
right to repair The right to repair refers to proposed government legislation to forbid manufacturers to impose barriers that deny consumers the ability to repair and modify their own consumer products (e.g. electronic, automotive devices or farm vehicles such ...
electronic devices.


Use by fossil fuel companies for greenwashing

Fossil fuel companies, funders and public relations agencies including
ExxonMobil ExxonMobil Corporation (commonly shortened to Exxon) is an American multinational oil and gas corporation headquartered in Irving, Texas. It is the largest direct descendant of John D. Rockefeller's Standard Oil, and was formed on November 30, ...
,
Shell Shell may refer to: Architecture and design * Shell (structure), a thin structure ** Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses ** Thin-shell structure Science Biology * Seashell, a hard o ...
,
Aramco Saudi Aramco ( ar, أرامكو السعودية '), officially the Saudi Arabian Oil Company (formerly Arabian-American Oil Company) or simply Aramco, is a Saudi Arabian public petroleum and natural gas company based in Dhahran. , it is one of ...
,
McKinsey McKinsey & Company is a global management consulting firm founded in 1926 by University of Chicago professor James O. McKinsey, that offers professional services to corporations, governments, and other organizations. McKinsey is the oldest and ...
, and
Goldman Sachs Goldman Sachs () is an American multinational investment bank and financial services company. Founded in 1869, Goldman Sachs is headquartered at 200 West Street in Lower Manhattan, with regional headquarters in London, Warsaw, Bangalore, H ...
are among the largest customers of Google Ads. One in five Google Ads for climate-related terms (e.g. net zero, carbon storage, carbon capture and energy transition) were paid by fossil fuel companies. A study by ''The Guardian'' and InfluenceMap found that Shell's ads appeared on 86% of searches for "net zero". Over half of users in a 2020 survey could not tell the difference between a normal Google result and a Google Ad. One of the study's authors, InfluenceMap stated "Google is letting groups with a vested interest in the continued use of fossil fuels pay to influence the resources people receive when they are trying to educate themselves. The oil and gas sector has moved away from contesting the science of climate change and now instead seeks to influence public discussions about
decarbonization Climate change mitigation is action to limit climate change by reducing emissions of greenhouse gases or removing those gases from the atmosphere. The recent rise in global average temperature is mostly caused by emissions from fossil fuels b ...
in its favor."


See also

*
AdSense Google AdSense is a program run by Google through which website publishers in the Google Network of content sites serve text, images, video, or interactive media advertisements that are targeted to the site content and audience. These advert ...
*
List of Google products The following is a list of products, services, and apps provided by Google. Active, soon-to-be discontinued, and discontinued products, services, tools, hardware, and other applications are broken out into designated sections. Web-based produc ...
*
Click fraud Click, Klick and Klik may refer to: Airlines * Click Airways, a UAE airline * Clickair, a Spanish airline * MexicanaClick, a Mexican airline Art, entertainment, and media Fictional characters * Klick (fictional species), an alien race in the g ...
*
Search engine marketing Search engine marketing (SEM) is a form of Internet marketing that involves the promotion of websites by increasing their visibility in search engine results pages (SERPs) primarily through paid advertising. SEM may incorporate search engine opti ...
*
Central ad server Ad serving describes the technology and service that places Advertising, advertisements on Website, Web sites, Mobile_app , mobile apps, and Smart_TV , Connected TVs. Ad serving technology companies provide software to Web sites and advertisers ...
*
Performance-based advertising Performance-based advertising, also known as pay for performance advertising, is a form of advertising in which the purchaser pays only when there are measurable results. Performance-based advertising is becoming more common with the spread of e ...
*
Pay-per-click Pay-per-click (PPC) is an internet advertising model used to drive traffic to websites, in which an advertiser pays a publisher (typically a search engine, website owner, or a network of websites) when the ad is clicked. Pay-per-click is usually ...
*
Digital marketing Digital marketing is the component of marketing that uses the Internet and online based digital technologies such as desktop computers, mobile phones and other digital media and platforms to promote products and services. Its development duri ...


References


External links

* {{Authority control
Ads" \n\nads.txt (Authorized Digital Sellers) is an initiative from IAB Technology Laboratory. It specifies a text file that companies can host on their web servers, listing the other companies authorized to sell their products or services. This is des ...
Pay-per-click search engines Online advertising services and affiliate networks Online advertising methods Marketing companies established in 2000 2000 establishments in the United States