Starting with U.S., English-language users, Google unveiled the Knowledge Graph. Search now looks at the words of your query and identifies the things in it. You're not just searching the Web anymore. You're searching the world.

Both comScore and Experian agreed that Yahoo’s search partner Bing, which powers Yahoo’s organic and paid search results, increased its search market share in April.

U.S. online ad spending will reach $37.5 billion this year, up 18.0% over last year, according to investment firm ThinkEquity, which revised its forecast based partly on solid Q1 trends.

Microsoft believes it can make search better by enabling Bing users to pose questions during the search process to Facebook users.

The investigation is in response to a complaint about discriminatory AdWords practices filed by an Indian marriage website.

Currently AdWords offers three different variations for ad rotation: optimize for clicks, optimize for conversions, and rotate evenly.

Findings are bit counterintuitive and unexpected, given how prominent search and the search box are on the home screen of most Android handsets and how deeply integrated Google is into that experience.

A combination of cheaper clicks and greater order values means paid search investments generated better returns for marketers, according to research from PM Digital.

Foursquare hopes to launch paid search during the next two months.