February 12, 2010
[efoods]Google will now use hours of search history to target ads that users see when they search keywords on the site, the company announced in a blog post.
Previously, Google (GOOG, Fortune 500) targeted on a query-by-query basis; the site used only current search terms to match ads from third-party Web sites. For example, a user searching for “baseball glove” might see ads for baseball lessons appear on the top and sides of the page.
Now, Google says its ad server, AdSense, has “recently started to expand the use of the query words … to a few hours so we can so we can continue to deliver more relevant ads.”