Entertainment is a consumer-driven activity understood objectively, encompasses communication between text and audience from an external stimulus, offers pleasure and occurs in a passive form. (Oliver and Barstsch, 2010)
The famous story of Scheherazade from the Persian professional storytelling tradition is an example of entertainment. It inspired Rimsky-Korsakov, Ravel and Szymanowski to make orchestral works; it was made into a film and there are innovative video games based on it.
Entertainment often hits on the points the brain was evolved to understand the world and deeply react to – like social backstabbing, murders and other themes. It stimulates the brain to realease seratonin and dopamine and it makes us feel good.