Entertaiment is a broad category that includes everything from a single private entertainment event involving food, music and a good time for two, to large scale performances intended for thousands or even global audiences. It is also a category that continues to evolve as familiar themes, images and structures are adapted to different media. For example, the story of Scheherazade from Persian professional storytelling traditions has been adapted as an orchestral work by composers such as Rimsky-Korsakov and Ravel, a film by Pasolini, and a video game.
Entertaiment often hits on the points that our brains were evolved to deeply respond to in order to understand the social world. This makes it a powerful and important form of entertainment.