Playing free slot games gives you access to a “bankroll” of valueless “play money”, enabling you to place bets as you spin the reels. Like real money slots, this practice lets you select how many paylines to activate, with winnings shown as they accumulate. Furthermore, this game serves as a good way to learn keeping track of your bankroll if ever opting to switch over and wager real cash instead. During bonus rounds some can even feature special “wild avalanches” allowing wilds cascading across reels for extra wins!