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
Trip (search engine) This is a repository of clinical Q&As from a variety of Q&A services. At launch it had over 5,000 Q&As and currently has over 6,300. This content has been integrated into Trip. Trip (search engine) Trip is a free clinical search engine. Its primary function is to help clinicians identify the best available evidence with which to answer clinical questions. Its roots are firmly in the world of evidence-based medicine. The site was created in 1997 as a search tool to help the staff of ATTRACT answer clinical questions for GPs in Gwent, South Wales. Shortly afterwards "Bandolier" highlighted the