FACEBOOK TRICK TO SPY ON YOUR COMPETITOR

  Simple but yet still powerfull trick to use. When you're scrolling trough your NewsFeed and see an ad that you want to know which targeting used just click on three dots (like on the picture below) and click on "Why am i seeing this" option.
 When you click you will see usefull informations of age range, country and interests (or even pixel if it shows because you visited their site). Useful things to consider and get an idea where you should target!