Several search engines are featured. Blekko reinvigorated its search engine optimization (SEO) data by integrating its continuous crawl information directly into its SEO product. Bing added back links to Advanced Search and Search History. On the homepage, after clicking in the search box, the drop-down box includes recent searches and popular searches with the Manage Search History link at the bottom. Google added its Knowledge Graph, which presents basic information on certain search topics (things, people, or places in Google's knowledgebase), at the top right of the search results. Twitter Search has added spelling corrections and related search suggestions. The spelling corrections are a unique set since Twitter usernames, hashtags, and tweets often use non-standard spellings. Yahoo! has introduced Yahoo! Axis with visual previews and instant answers.
Reproduced with permission of the copyright owner. Further reproduction or distribution is prohibited without permission.