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 Engine Strategies Search Engine Strategies Search Engine Strategies (SES) is a conference series focused on search engine marketing and search engine optimization. The conference was created by Danny Sullivan, founder and former lead editor of Search Engine Watch. The first SES conference was on November 18, 1999 in San Francisco, California and marked the first formal occasion that site owners had met with search engines. The conference expanded internationally in 2000 when the first SES UK was held in London, England on April 27, 2000, followed by Denmark in 2001, Germany in 2002, and France, Sweden, Canada, Italy and China until 2006.