How do casino deposits work?

Hello. If you are interested in gambling, then you should definitely go here https://casinosnobrasil.com.br/bonus-dos-cassinos/sem-deposito/ here you can definitely find everything about casinos. In this case, it is useful and clear about deposits, what it is and how it works. In short, it's about getting the opportunity to play and win a reward, but to get it you need to make an initial deposit. If I'm wrong, please correct me.