The Hilltop algorithm is an

algorithm In mathematics and computer science, an algorithm () is a finite sequence of Rigour#Mathematics, mathematically rigorous instructions, typically used to solve a class of specific Computational problem, problems or to perform a computation. Algo ...

used to find documents relevant to a particular keyword topic in news search. Created by

Krishna Bharat Krishna Bharat (born 7 January 1970) is an Indian research scientist at Google Inc. He was formerly a founding adviser for Grokstyle Inc. a visual search company and Laserlike Inc., an interest search engine startup based on Machine Learning. ...

while he was at Compaq Systems Research Center and George A. Mihăilă

University of Toronto The University of Toronto (UToronto or U of T) is a public university, public research university whose main campus is located on the grounds that surround Queen's Park (Toronto), Queen's Park in Toronto, Ontario, Canada. It was founded by ...

, it was acquired by

Google Google LLC (, ) is an American multinational corporation and technology company focusing on online advertising, search engine technology, cloud computing, computer software, quantum computing, e-commerce, consumer electronics, and artificial ...

for use in its news results in February 2003. When you enter a query or keyword into the Google news search engine, the Hilltop algorithm helps to find relevant keywords whose results are more informative about the query or keyword. The algorithm operates on a special index of ''expert documents''. These are pages that are about a specific topic and have links to many non-affiliated pages on that topic. The original algorithm relied on independent directories with categorized links to sites. Results are ranked based on the match between the query and relevant descriptive text for

hyperlink In computing, a hyperlink, or simply a link, is a digital reference providing direct access to Data (computing), data by a user (computing), user's point and click, clicking or touchscreen, tapping. A hyperlink points to a whole document or to ...

s on expert pages pointing to a given result page. Websites which have

backlinks From the point of view of a given web resource (referent), a backlink is a regular hyperlink on another web resource (the referrer) that points to the referent. A ''web resource'' may be (for example) a website, web page, or web directory. A b ...

from many of the best expert pages are ''authorities'' and are ranked well. Basically, it looks at the relationship between the "expert" and "authority" pages: an "expert" is a page that links to many other relevant documents; an "authority" is a page that has links pointing to it from the "expert" pages. Here they mean pages about a specific topic with links to many non-affiliated pages on that topic. If a website has

backlink From the point of view of a given web resource (referent), a backlink is a regular hyperlink on another web resource (the referrer) that points to the referent. A ''web resource'' may be (for example) a website, web page, or web directory. A ba ...

s from many of the best expert pages it will be an "authority".

References

External links

*
Interview with Krishna Bharat
Business Today, June 6, 2004 *
When Experts Agree: Using Non-Affiliated Experts to Rank Popular Topics
by K. Bharat and G. A. Mihaila is substantially the same, but under a different title. Google Search Reputation management {{algorithm-stub

See also

References

External links