How do I use Sweeps-casino as a newbie?

Can‍‌‍‍‌ someone please explain to me what Sweeps-casino is? I am confused a little bit. Is it a gaming platform that runs the games, or is it a separate thing? I have been trying to figure out how to register and start playing, but it has been quite difficult for me. As a total newbie, I don't know anything about these social casinos, guys, if you could help me, it would be ‍‌‍‍‌great.