Extras are sometimes referred to as "background actors" or "supporting actors." They are often used to fill out a scene, and they may be used to represent a variety of characters, such as pedestrians, shoppers, or party guests. Extras are also often used to create a sense of atmosphere, and they may be used to represent a particular time or place.
Extras are not typically required to have any formal training or experience, and they are often paid a flat fee for their work. However, some extras may be required to have specific skills or qualifications, such as being able to drive or speak a particular language.
Extras can be a great way for aspiring actors and actresses to get experience in the entertainment industry. They can also be a fun and rewarding way to meet new people and make new connections.