While some slots have straightforward gameplay and few bonus features, others have tons of exciting features like bonus rounds and free spins. Certain slot machines feature expanding wilds that encompass the entsatta king.ire reel, while other machines have cascading reels that swap out winning symbols for new ones, giving players the opportunity to win again. A common kind of online slot game is the progressive jackpot slot, which has the potential to pay out enormous sums of money up to millions of dollars. A tiny percentage of every wager made on these slots is added to a central jackpot pool, which is connected to numerous casinos.