Have you already registered in any social casino? How did you choose it, because someone recommended it? It took me about a week to choose a good social casino, and since you are a beginner, I wonder how you managed it. I play in Fortune Coins social casino and from time to time articles appear on the site, one of them is about what is RTP in casino, I advise you to read it too. I have been playing in a social casino for about a year and I learned almost all the information from their articles. RTP is the percentage of return to the player, which is usually written in the description of the slot as one of the indicators, there is nothing difficult here.