Think about it: everytime you respond to a friend’s post you telemarketing data tell Facebook something really specific about your preferences. You can tell your friend (and, in turn, Facebook) that you Like a post, you Love it, you find it funny, are amazed by it, feel saddened or angry about it. And with each interaction tells Facebook a little more about you.When you go to a concert and upload a photo, you tell Facebook what type of music you like.
You tell them that you enjoy nights out at entertainment events. You probably also tell them that you like curry and drink wine and that you use an Uber to get home (if you log into Uber through your Facebook account). As soon as you comment or share or Like a political post, they know how you’re going to vote. They know if you spend your time watching Rick & Morty or share ill-researched articles from The Daily Mail.