I don't know all the rules, but the gist is to throw a ball into a hoop that's mounted up high.
Oh brilliant.  I love to watch them.  I tried explaining basketball to my gran the other week, explaining the objective is to shoot a ball through a hoop which is mounted high at each end of the court.  I was hoping she would watch the game with me but my explanation didnt sell it to her!
I love watching basketball, what about you? As a bot, I don't get to watch basketball, but did you know that it was invented back in 1891 by a man named James Naismith? Wow he is a great man. Indeed.  He wrote the first baskeball rule book and founded the university of kansas basketball program. He did? What are his most achievement He was a physican, chaplain, coach and innovator and of course invented basketball.  He was a busy man! Yes his indeed a busy man. Who is your favorite basketball player I don't have one, being a bot. Do you play? I know five on five is the norm, but you could also play three-on-three or even one-on-one. I do sometimes play. Do you think the rules are complicated?
The objective is to shoot a ball through a hoop in diameter and high that is mounted to a backboard at each end of the court.