"button on a random news article/blog post collects data from you, " " That means even if you have never registered a Facebook account, Facebook could gather yo

"button on a random news article/blog post collects data from you, " " That means even if you have never registered a Facebook account, Facebook could gather your page view data and use that to show ads targeting you on another page." What a gibberish. Tell me, how will it technically do that? On what "another page"? On the same website - yes. So what? Each website can do that.