Swipe ideas from some of the best Facebook ads
Advertiser: Game of Thrones
Erm, because it's Game of Thrones, and because it's a hot topic.
Notice how the copy opens with a question? That's designed to get you thinking and imagining right from the outset, which is a good tactic to use.
I also like the embedded poll option too. Any type of interaction on an ad is going to see a larger amount of clicks.
VIsuals are great, too.