Theoretical Return ("RTP") is the theoretical percentage of winnings that a slot game will pay back to a player over time, expressed as a percentage of the total amount wagered. The higher this value is, the lower the advantage of the casino.
For example, for a theoretical 95% return, if you place 100 bets of R$1 each, you can expect to receive an average of R$95.
Please note: this is a theoretical value since the slot machine's results are from of Random Number Generator.