Keno is a numbers game that has been enjoyed for centuries, particularly popular in parts of Europe. It is a variation of the lottery, where players select up to 20 numbers out of a total of 80. Players must then wait for the outcome of the draw, which is conducted using random number generator software. If the numbers selected match any of the drawn numbers, the player wins. The winning numbers are determined by a set of keno balls and are usually printed on a ticket, which the players keep for reference.