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Google Panda is a major change to
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Google
's search results ranking algorithm that was first released in February 2011. The change aimed to lower the rank of "low-quality sites" or "thin sites", in particular "
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", and return higher-quality sites near the top of the search results.
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reported a surge in the rankings of
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and
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, and a drop in rankings for sites containing large amounts of advertising. This change reportedly affected the rankings of almost 12 percent of all search results. Soon after the Panda rollout, many websites, including Google's webmaster forum, became filled with complaints of scrapers/copyright infringers getting better rankings than sites with original content. At one point, Google publicly asked for data points to help detect scrapers better. In 2016,
Matt Cutts Matthew Cutts (born 1972 or 1973) is an American software engineer. Cutts is the Administrator of the United States Digital Service. He was first appointed as acting administrator, to later be confirmed as full administrator in October 2018. Cut ...

Matt Cutts
, Google's head of webspam at the time of the Panda update, commented that "with Panda, Google took a big enough revenue hit via some partners that Google actually needed to disclose Panda as a material impact on an earnings call. But I believe it was the right decision to launch Panda, both for the long-term trust of our users and for a better ecosystem for publishers." Google's Panda received several updates after the original rollout in February 2011, and their effect went global in April 2011. To help affected publishers, Google provided an advisory on its blog, thus giving some direction for self-evaluation of a website's quality. Google has provided a list of 23 bullet points on its blog answering the question of "What counts as a high-quality site?" that is supposed to help webmasters "step into Google's mindset". It has been incorporated in Google's core algorithm since year 2015. The name "Panda" comes from Google engineer Navneet Panda, who developed the technology that made it possible for Google to create and implement the algorithm.


Ranking factors

The Google Panda patent (patent 8,682,892), filed on September 28, 2012, was granted on March 25, 2014. The patent states that Google Panda creates a ratio with a site's and reference queries, search queries for the site's brand. That ratio is then used to create a sitewide modification factor. The sitewide modification factor is then used to create a modification factor for a page based upon a search query. If the page fails to meet a certain threshold, the modification factor is applied and, therefore, the page would rank lower in the search engine results page. Google Panda affected the ranking of an entire site or a specific section rather than just the individual pages on a site.


Updates

For the first two years, Google Panda's updates were rolled out about once a month, but Google stated in March 2013 that future updates would be integrated into the algorithm and would therefore be continuous and less noticeable. Google released a "slow rollout" of Panda 4.2 starting on July 18, 2015.


See also

*
Google Hummingbird Hummingbird is the codename given to a significant algorithm of an algorithm (Euclid's algorithm) for calculating the greatest common divisor (g.c.d.) of two numbers ''a'' and ''b'' in locations named A and B. The algorithm proceeds by success ...
, 2013 * Google penalty * Google Penguin *
Spamdexing Spamdexing (also known as search engine spam, search engine poisoning, black-hat A black hat hacker (or black-hat hacker) is a Hacker (term), hacker who violates computer security for their personal profit or malice. Origin The term's origin ...


References

{{Google LLC Search engine optimization Link analysis
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