And yet, as , few studies have looked at whether Facebook ads work, so nobody knows how effective social advertising really is. That's a problem, since the majority of Facebook's revenue comes from advertising.

With so much at stake for the social network, it's a good bet the company will look to reassure investors that Facebook is the advertising giant many businesses hope it will be. For Facebook users that means we can expect more advertising experiments coming our way through the desktop and mobile versions of Facebook, and maybe even on third-party sites.

Let's just hope the advertising madness doesn't get too far out of control.

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