How Google makes $100 million a day — and how GOOG lost $21 billion last week (infographic)

Last week Google stock crashed 10%, shedding about $21 billion in market value, when its earnings were prematurely released. Google revenue was up ... but profit was down.

Revised report suggests Twitter mobile ads are actually more engaging than Facebook ads

Whoopsie. Proving that it’s always good to dot those i’s and cross those t’s, social media firm TBG Digital has amended a report that originally concluded that Facebook’s mobile ad click-through rate (CTR) is four times that of the mobile …

What Facebook isn’t telling you about its risky ad business

In its IPO filing Wednesday, Facebook identified mobile’s limited revenue potential, competition from other social networks, and the potential loss of advertisers as factors that could seriously harm its business. But was the social networking company, which relied on advertising …