A "win" in a slot is a referenc to the amount you'll win when you hit a winning combination while playing a casino slot. This combination is usually triggered by the matching of a certain number of symbols on any given active payline. The amount of a win depends on various factors such as the value of the symbol, the amount wagered, and the number of active paylines. When you play slots for free at and affiliate slots, you can achieve virtual winnings without using real money.