The scatter symbol is not the same as other symbols in two ways. As a matter of first importance, the scatter symbol does not need to be on an active payline to get results.
Another distinction between scatter symbols and other symbols is that a wild symbol can not supplant the scatter symbol. Of the considerable number of symbols that the wild symbol can supplant, it can not supplant the scatter symbol. As you display more scatter symbols per turn, the payout goes up. To expand your payout, ensure you pay all lines. The explanation behind this is that litter payment is a multiplication of the total bet rather than taking the line bet.