Entertaiment is the act of entertaining. It also refers to something affording pleasure, diversion or amusement: a play; a crossword puzzle. Entertainment may be a form of education, or it can be for pure enjoyment: a banquet adapted to two; a theatrical performance intended for thousands. The word is often abbreviated to entmt. on fliers or in industry news publications, especially when space is limited.
Entertainment is important because it allows people to escape from the stresses of everyday life. It can stimulate the brain to release seratonin and dopamine. It can be light and fun or it can be intense and challenging. It can even be controversial.