Not many of the deal’s details have emerged just yet. Apparently, the Hyatt ads will take users to the chain’s mobile web site and will allow people to sign up for the chain’s loyalty program, as well as letting them book rooms and check in through their phones. Chicago-based Hyatt has some 370 hotels in 44 countries.

SEE ALSO: Microsoft Plunges Into Mobile Advertising With Verizon Wireless Deal

The deal is one of the first since Microsoft’s began its run as Verizon’s default search box last month. Though there has been debate on whether users will eventually bypass default engines to seek out the search engine of their choice, for now, these default arrangements are increasing traffic. Microsoft’s GM for mobile media Charles Johnson told Bloomberg that in the first 20 days as Verizon’s default search, Microsoft’s mobile search handled 19 million queries, 10 to 15 times the previous rate. Microsoft reportedly paid $550 and $650 million to secure the 5-year exclusive deal to beat out Yahoo (NSDQ: YHOO) and Google.

According to Sanford C. Bernstein, mobile advertising revenues will reach $7.2 billion by 2012. Much of that mobile ad revenue is expected to come from search engine ads.