The Freedom From Religion Foundation (FFRF) is a group of people who believe that people should have the right to choose whether or not to believe in a God or religion.
Sometimes people think that everyone should believe in the same thing or that they should follow a certain religious tradition. But the FFRF says that people should be able to make their own decisions about what they believe in or don't believe in.
The FFRF also works to make sure that religion is not forced on people in places like schools or government buildings. This means that everyone, regardless of their religion or beliefs, should feel comfortable and free to practice or not practice their beliefs.