How to actually combine meshes

Ok im getting really tired now, everywhere i go to look at optimization tips they all tell us to combine meshes but how the hell do you actually do that? if there a menu button? does it actually mean to make it into a prefab???

This kind of advice usually has in min: combine meshes in your 3d tool. That means merging them into single mesh entity and reducing amount of materials you use.

Unity also has helper functions for merging meshes, but that is not what you want by default.

You can check out my tool on the unity asset store “Poly Few” which is a complete optimization solution for Unity aimed at making high quality complex 3d scenes render efficiently. With integrated features like mesh simplification, automatic LOD generation, mesh combining and material combining, you can greatly improve the performance of your game by lowering the Polygon Count, DrawCalls and SetPass calls with a few clicks and, without the need of writing even a single line of code.