What are the options for optimizing the game?

Question

Game development

We make the game for three platforms:
PC, Web, Mobile
Question:
Do you need to make your own models and textures for each platform (reduce the number of verticals and the quality of textures for Web, Mobile)?
and what else needs to be optimized:???
I will be glad to any advice!

Answer 1

reduce the number of verticals and texture quality for Web, Mobile

It is possible, but it depends on the complexity of the models themselves. And it's also possible:

• push textures into atlases (will be useful for all planforms)
  
• enable lighter renred
  
• use simpler materials
  
• use as few materials as possible (will be useful for all platforms, implemented together with the first paragraph)