No, Facebook is almost certainly not listening to you 24/7 through the mic to show you advertisements.Of course there is a remote possibility of it happening. One that would include collusion with all of the other major tech companies and the US government, millions of tech workers and state officials keeping it a secret, and security researchers who uncovered CIA programs that turned on mics for specific smart TVs not being able to detect Facebook doing this.What is actually happening is the data collection we all just ignore is way more valuable and invasive than you thought. All of those little data points add up to knowledge that is equivalent of knowing everything you say.When you say something out loud while watching TV and then see an ad for it, this is a combination of confirmation bias and the fact that smart TVs send data about what you are watching to advertisers.For some reason we are all more afraid and up in arms about a mic being turned on as compared to gleaning so much meta data they know what you are going to say out loud before you even say it.