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
Search Technologies services. Their customers include Booz Allen Hamilton, Library of Congress, Lenovo, U.S. Government Printing Office, and Unilever. The company has experienced steady, rapid growth since its founding which is attributed to their sole focus on implementing search solutions for clients. In December 2009, Search Technologies acquired InfoSolutions Inc., a Cincinnati-based company also focused on search engine solutions. In January 2015, Search Technologies acquired INCAD, a Prague-based provider of enterprise search solutions. In August 2017, Accenture acquired Search Technologies for an undisclosed amount. Search Technologies has been a Microsoft GOLD certified partner since 2008, with specific competencies in Search and Digital