Actors' unions are organizations that represent the interests of performers in the entertainment industry. They negotiate contracts, ensure fair wages, and provide benefits such as health insurance and retirement plans. The most well-known union for actors in the United States is the Screen Actors Guild - American Federation of Television and Radio Artists (SAG-AFTRA). These unions also advocate for the rights of their members, addressing issues like working conditions and job security. By joining a union, actors gain access to resources, training, and networking opportunities, which can help them advance their careers in film, television, and theater.