You answer questions to gain money. If you press the Walk Away button you keep the amount of money that is shown on the minimum money counter on the left, the same thing happens if you get a question wrong. You can only get one question wrong. NOTICE: Money is not real, it is a game. You will not receive the money after winning or walking out.
https://millionaire.fandom.com/wiki/Chris_Tarrant picture of the game host. https://en.wikipedia.org/wiki/Who_Wants_to_Be_a_Millionaire_%28American_game_show%29 The logo for the game.