There are many different slots features used by developers to enhance the gameplay. You can find out which features a game has by reading our reviews of checking the info screens before you get started. Info screens in a game will show you the payouts attributed to each symbol as well each of the features that can be triggered as you spin. One of the most popular features is free spins. These are a set number of free plays credited within the game that usually play out with additional features activated. Sometimes the biggest wins can be triggered during a free spins round.