Entertaiment is a broad category that can include movies and television, music, sports, games, social events, books, and other intellectual pursuits. Often entertainment is meant to make people laugh or feel happy, but it can have a more serious purpose as well (like ceremonies, celebrations, religious festivals, and even satire). It can also stimulate the brain to realease seratonin and other chemicals. The mind was evolved to react deeply to a lot of what is presented as entertainment.