On Roblox, @ usually means a function attribute in Luau, not a chat symbol or player tag. The main one people run into is @native, which tells Roblox to compile that function to native code for better performance.

What it does

  • It goes right above a function in a script.
  • It changes how the compiler or analyzer treats that function.
  • It currently has very limited use, and @native is the best-known example.

Example

lua

@native
function foo()
end

This marks foo for native compilation.

If you saw an error

If Roblox highlighted @something as an invalid attribute, that usually means the name you used is not a supported attribute. The feature is still pretty new, and community posts say @deprecated also exists now for marking code as deprecated.

Simple answer

So the @ is for attributes on functions in Roblox scripting, mainly to guide the compiler or linter rather than changing gameplay logic.