I've just started to venture in to the Facebook Ads word as I need to build a page. I'm testing things out to get a feel for it and hopefully learn and adjust as I go. Under "Bidding and Pricing" I left the Bidding option as "Bid for Page Likes". My budget is set to $1 per day. So far today I have ZERO likes and yet my total spent is $0.72 and the reach is only 125. Under Max Bid it says, "Auto Optimized CPM". This is driving me nuts. I know CPM is cost per thousand but I didn't bid on CPM, I bid on Page LIKES. What am I being charged for?