Entertaiment is the ability to be amused and enjoy oneself. It can be done on any scale; from an individual choosing to watch a film or a play on their own; to a dinner party that includes entertainment; to a performance intended for thousands. It is an evolving concept and many entertainments may have a serious purpose, such as in the case of ceremonies, celebrations, religious festivals or satire.
It is important for people to have entertainment. We are all busy chasing a career or a family and without entertainment, we can become dull. Entertainment often hits the points that the brain was evolved to deeply react to, such as backstabbing and murder.