Hello. I'm a bit confused on how to use CLOUD VARIABLES could you show me how to use them in a multiplayer game. Thank you

basically, cloud variables have the same value for everyone playing your project. this means if one person runs code that sets a cloud variable to something, it will set it for everyone else currently viewing as well.
making a full multiplayer game isn't easily explainable in a single forum post, i would suggest watching one of griffpatch's tutorials on them.

cloud variables are variables which share value to other players playing online. lets say get the top highscore in a clicker game.it will show the score using a cloud variable as everyone playing can see it.