A movie extra or background actor is someone who plays a non-speaking role in a movie, TV show, or commercial. No matter what the show, most scenes need from several to hundreds of people in the background to provide believability and bring the scene to life.
You’ll see them in crowds, hospitals, schools, busy city streets, and sporting events. I was in a war scene that needed over 100 extras (mostly young men) to make it believable.
Sometimes extras can even be featured up close with the speaking actors, like a taxi driver dropping off the main character at the airport.
Good looks don’t matter and neither does acting talent. They need ordinary people of all ages, types, and sizes and no experience is no problem.