Earnings Forecast

Facebook earnings preview: Teens, mobile & ad growth in focus

Despite recent studies raising questions about Facebook's longevity, the social giant is on track to report a stellar quarter.

Analysts project revenue will grow 47 percent to $2.33 billion, and earnings per share will grow 56 percent to 27 cents. But what investors will really be looking for are indications of "Facebook Fatigue" as the social network nears its 10th birthday in February, and signs of future profits from mobile and video ads.

(Read more: Facebook launches'Trending' to drive event chat)