What exactly is "fantasy sports"?

Question

I had a bit of a picture in my mind of what constituted fantasy sports, but I've been noticing that it's probably a very wrong one. Could someone explain to me what exactly fantasy sports are/is?

Answer 1

Fantasy sports is making up your own team using the best players in the sport.  

You get points based on the performance of the players, and you compete against other people to see who has constructed the best team.