Most slot game variations have several special symbols that affect gameplay in various ways. The two most common special symbols are Wild and Scatter symbols.

Wild Symbols

Like wild cards in a game of poker, Wild symbols in Slots can take the place of any regular symbol, except Scatters. Wild symbols do not activate any special bonus awards on their own, but their presence on the reels makes winning choice awards along selected paylines more likely.
Wild symbols cannot take the place of Scatter symbols.

Scatter Symbols

Scatter symbols award mostly special bonuses. Scatter symbols disregard paylines entirely. The presence of scatter symbols anywhere on the reels will award cash prizes, regardless of their position.
If three or more scatter symbols are showing, the player will be awarded Free Spins.