49ers
In short
The San Francisco 49ers are a professional American football team based in the Bay Area that competes in the National Football League.
In plain words
They are one of the most successful teams in football history. They play their home games at Levi's Stadium and wear red and gold colours.
A simple example
When the team scores a touchdown, the stadium crowd cheers and the scoreboard updates to show their new points.
Why it matters
The team has won five Super Bowl championships, making them a major force in American sports culture. They have a massive global following and a long history of star players.
Easy to mix up
Do not confuse them with the San Francisco Giants, who are a baseball team.