Last month, salesforce.com (NYSE: CRM) sharpened the branding for its Marketing Cloud services via a new domain -- social.com -- and added tools for managing ad campaigns delivered via social networks. The company spent $2.6 million to acquire the rights to social.com two years ago, ReadWriteWeb reports.

If that sounds extravagant, it is. But the opportunity may justify the bet, says Tim Beyers of Motley Fool Rule Breakers and Motley Fool Supernova in the following interview with the Fool's Erin Miller. BIA Kelsey predicts that social ad spending will more than double from $4.7 billion last year to $11 billion in 2017.

Does the move make Salesforce stock a buy? Having a single domain allows Salesforce to offer clients a one-stop interface for creating and managing campaigns for Facebook (NASDAQ: FB) and Twitter, which serve at least 1.5 billion users between them. Salesforce is tapping a large and growing opportunity that, for now, no one else wants, Tim says.

Do you agree? Please watch the video to get Tim's full take and then let us know whether you'd buy, sell, or short Salesforce stock in the comments box below.

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Fool contributor Tim Beyers is a member of the Motley Fool Rule Breakers stock-picking team and the Motley Fool Supernova Odyssey I mission. He owned shares of salesforce.com at the time of publication. Erin Miller had no position in any stocks mentioned. Check out Tim's Web home and portfolio holdings, or connect with him on Google+Tumblr, or Twitter, where he goes by @milehighfool. You can also get his insights delivered directly to your RSS reader.

The Motley Fool recommends Facebook and salesforce.com and owns shares of Facebook. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.