ELI5: Explain Like I'm 5

18 (British Board of Film Classification)

The number 18 is like a special sign that tells you a movie or TV show is not suitable for kids under the age of 18. It means that there are some things in the movie or TV show that are too grown-up for young kids to see or hear about. These things could be violence, scary scenes, sex, drugs, or bad language. The people who make and rate movies and TV shows want to make sure that kids only see things that are appropriate for them, so they use this number to help parents and kids know which movies and TV shows are okay for them to watch.