Customising your Roblox avatar doesn't affect how the game plays, but it does make the experience more personal to you, which can be important if you plan to spend a lot of time with the platform.

Image shows one of the original R6 avatar types in "Roblox". These characters were made up of just 6 blocks and painted textures for clothing. Roblox Corporation Image shows an R12 avatar in Roblox.