Basketball is one of the most popular sports in the world and has become popular for a number of reasons.
Basketball is fun to play, has a very fast and exciting pace of play. Also, each player on the court gets to play both offense and defense and the roles of each player are only loosely defined.
Much of basketball easily can be practiced (like shooting or dribbling) with one person making it easy to learn. The sport also is great for one-on-one play all the way up to 5-on-5, so you don't need a big crowd to get a good game going.
Simple equipment: With basketball all you need are a ball and a hoop.
Basketball is fun to watch: Some of the worlds greatest athletes are basketball players. The game is fast-paced and full of excitement and lots of scoring.