It’s been a big factor in Linux now having extremely strong support for windows games as it runs Linux and uses PC hardware. It’s built/supported by Valve and they did a lot of the heavy lifting on improving the windows compatibility layer to where it is now.

What that generally means is basically anything in Steam will run well in Linux even if it’s not a native Linux game (which most aren’t).

Otherwise, Proton’s the name of Valve/Steam’s compatibility layer, and you can look up game-specific user reports on playability here: https://www.protondb.com/