Public service announcements (PSAs) are messages that are aimed to help people in your community with important information. They are usually created by organizations or businesses and are broadcasted on TV, radio, magazines, or online. PSAs are usually done to raise awareness about certain issues, such as health, bullying, drugs, and the environment. They might also be used to encourage people to do something positive, like volunteer or donate. So basically, PSAs are special messages that try to help and educate people in your community.