by Josh Constine, TechCrunch

“Facebook is making quick progress in growing its mobile advertising business, according to major ad platform Kenshoo. It sees 20% of all Facebook ad spend going to mobile. That’s a big boost from October when Facebook said 14% of its ad revenue came from mobile. Meanwhile, 71% of Facebook ad spend targeted to mobile phones goes to Android, further proving Facebook has to focus more on Google’s OS.”

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