The world's number one social network posted its biggest single day percentage gain – since going public.
Up nearly 30% Thursday to close at more than $34 a share.
Facebook rallies 30%, logs best day ever
Fueling the rally was a huge jump in revenue from mobile advertising - something that's plagued the company since it went public over a year ago.
Has Facebook finally figured it out?
OutFront: David Kirkpatrick , author of the "The Facebook Effect"