Its a simple technique to use just one material to all the assets in the scene. So it would be helpful in Game optimization.
On this page of the site you can watch the video online Optimizing materials for Unity | Quick Learn | Game Optimization with a duration of hours minute second in good quality, which was uploaded by the user CG AURA 13 May 2020, share the link with friends and acquaintances, this video has already been watched 2,906 times on youtube and it was liked by 85 viewers. Enjoy your viewing!