Nfl
In short
The National Football League is the premier professional American football league in the United States and Canada. It consists of 32 teams split equally between the American Football Conference and the National Football Conference.
In plain words
It is a massive sports competition where teams play American football to win a championship. The season starts in August and the best teams compete in a big final called the Super Bowl.
A simple example
A fan might buy a ticket to watch the Dallas Cowboys play against the New York Giants at a stadium.
Why it matters
It is one of the most popular and profitable sports leagues in the world. It generates huge amounts of money through television rights and global advertising.
Easy to mix up
Do not confuse it with soccer, which is known as football in most other countries.