With tens of thousands of ads, you can learn a lot about copy just by studying successful ads.
You can start with the popular copy report, and check what is working on your niche. Narrow down by timeframe to see what is working right now, but you can also select “All Time” to see the top copy overall. Click on “Copy Info” and see more info about that particular copy.
Then work on rewriting that copy, making it your own. Do this with several ads, and you will be a facebook copywriting expert in no time.