Entertaiment is any sort of activity that holds one’s interest and attention. It could be anything from a party to a non secular pageant, or even a satire. The word entertain comes from the medieval Latin intertenere, or “to hold inside.”
Usually, entertainment is considered good for one’s mental health, so long as it doesn’t hurt anyone or is below their dignity. This is because it stimulates the brain to release seratonin and dopamine, which gives one a nice feeling considering how the human mind was evolved to understand the world. However, many forms of entertainment can also hit on themes the mind was never intended to deep down react to.