Search engine optimization different signals. The leading search engines, Google, Bing, and Yahoo, do not disclose the algorithms they use to rank pages. Some SEO practitioners have studied different approaches to search engine optimization, and have shared their personal opinions. Patents related to search engines can provide information to better understand search engines. In 2005, Google began personalizing search results for each user. Depending on their history of previous searches, Google crafted results for logged in users. In 2007, Google announced a campaign against paid links that transfer PageRank. On June 15, 2009, Google disclosed that they had taken measures to mitigate the
Chomp (search engine) Chomp (search engine) Chomp was an app search engine company founded by Ben Keighran and Cathy Edwards in 2009. The company was based in San Francisco and had received $2.5 million in funding. Chomp’s app search engine was available on its own website, as well as in an app of Chomp's making intended for use on smartphones or tablets, and also as an integrated search box in partners’ websites or other content. Its proprietary algorithm allowed users to search for apps based on what they did, not just on what they were called. Users could search for apps across multiple