If you have 1 wild symbol, you will get 1 multiplier. If you get 3 wild symbols, and if you win the winning combination, your victory will be affected by a 3 multiplier. This means that when you are wild, you get a 5x multiplier for your winning spin!
A wild symbol is located in the middle row of the reel 3 and will remain stuck for the duration of the free spin function. Wild symbols can be displayed as a superposition of 2 or 3 symbols for a bigger victory.