The social network had 233.9 billion more impressions than the next largest display ad publisher.
Of the more than 1.11 trillion online display ads U.S. Internet users viewed in the first quarter, nearly one in three, or 31.2%, were delivered on Facebook, according to web measurement firm comScore Inc.
The leading social network led all web sites that displayed ads with 346.46 billion impressions, a 96.5% jump from the 176.31 billion impressions it delivered in the same period a year ago. Yahoo Inc. sites came in second with 112.51 billion impressions, followed by Microsoft Corp. (53.59 billion), AOL Inc. (33.45 billion) and Google Inc. sites (27.99 billion).
Facebook has increasingly focused on online advertising, rolling out offerings such as Sponsored Stories, an ad service that lets companies place their logos alongside content from Facebook posts that involve the company. Consumers can click the ads, which appear on the right-hand column of news feed pages in a box labeled Sponsored Story, to visit advertisers’ Facebook pages.