CTR stands for “click-through rate” which is the number of clicks that your ad generates, divided by the number of total impressions (times your ad was shown). For example, if your ad has a 1% CTR and was shown 100 times then it generated 10 clicks.
The average CTR on Facebook ads is anywhere between 0.05% and 3%. According to Facebook, when you promote a post with an ad, the suggested target audience may be up to 2x large than your total number of followers for that page or brand. In other words, they will show your post to more people thanks to the power of Likes and shares from others.
Average Click Through Rate (CTR) for Facebook Ads by Industry :