last year in an effort to boost the search giant's business reviews, and Zagat's data was integrated into its business search results. Google says it will do the same thing with Frommer's data, although it would initially appear separately.

The Frommer's acquisition is only Google's latest move in the travel space. In fact, in two years, the company went from having practically no presence in travel to a fairly strong position that rivaled its competitors.

Following the Zagat buy, the search company rolled out an update to its Google+ social networking service called in May of this year, which integrated those reviews into business listings.

Google also won approval for its acquisition of travel software company ITA, which allowed it to offer , and more recently . While this is an impressive run of acquisitions, they all came at the expense of the search giant's competitors, who have often found themselves shut out.