Brands such as Dell and Macy's are experimenting with Google+'s Hangouts video-chat feature. Michael Dell has hosted hangouts, while Macy's signed up blogger Leah Chernikoff to host a hangout. "The best usage [for brands] is where you have an influencer or a taste-maker or perhaps a celebrity who comes in and drives whatever's going on," said Jeff Semones, president of social media agency M80.

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