Google parent Alphabet saw its advertising revenue surge thanks to mobile search, YouTube and its programmatic ad business, it said Thursday during its fourth quarter earnings call. The company saw overall revenue of $26.1 billion for the quarter ending Dec. 31, up 22% from the same time last year. Ad revenue generated about $22.4 billion, up 17% year-over-year, Google said. Net income was $5.33 billion, up from $4.92 billion. Digital marketing firm Merkle said Google received 96% of all search-ad clicks on mobile devices in the fourth quarter. Get the full story at AdAge