Features of RTP in online slots
This value refers to the measure of return. That is, how much the slot machine will give the player in the process of spinning the reels. The value is prescribed as a percentage, not a single slot is not 100%. Otherwise, the slot would always give combinations.
The difference between the maximum value (in this case 100%) and the real RTP called advantage slot machine. It is a mathematical value, determines how often the slot will not make combinations.