It's simple. You have a card with the word Bingo printed at the top and under each letter is a row of random numbers. Sometimes you must write the numbers in though. You also have chips or a marker or something to mark the numbers. You mark the numbers when a person calls out a number and a letter. If you have that number under that letter then you either mark it or put a chip on it. Usually you play it where the number of squares along the side must be marked in dioganly, horizontaly, or verticaly. Other times you have to get all squares marked out or you have to get them marked in a certain pattern. I hope this helped!