What does it mean to use a compiled binding?

Use compiled bindings
Compiled bindings improve data binding performance in Xamarin.Forms applications by resolving binding expressions at compile time, rather than at runtime with reflection. Compiling a binding expression generates compiled code that typically resolves a binding 8-20 times quicker than using a classic binding. For more information, see Compiled Bindings.

I said, but I don't know how to do it.

Please tell me how to write in xaml and cs