If you want to find out why you keep seeing an ad, or you want to check who your competition is targeting with a Facebook ad, you can follow this advice.
On a paid ad (labeled with Sponsored) click the three dots in the upper right corner. You will see a dropdown menu with an option that says 'Why am I seeing this?' When you select this option, you will get information about the interest of the target audience, and/or information about the demographic.
PRO-tip:
If you want to see your competitors' ads, like and follow their FB page and regularly visit their website.
