Do textures affect RAM

I am finishing my game on a mobile device, however, that I will have to optimize textures due to the fact that they greatly affect performance (in particular RAM) or my version is wrong and most of the matter is not in textures, then tell me what exactly to optimize for me
(maybe a stupid question, but this is my first game and I’m a beginner)

                             stat memor

Streaming texture pool- 800mb mem-100% streaming

Texture memory pool - 800mb mem-100% texture

Texture memory used- 70mb physical

Pixel shader model- 20mb physical

the only question is RAM

previously Thanks!!!

i’ll test tomorrow

Textures very definitely affect RAM. The main areas are:

  1. Less textures

  2. Smaller textures

  3. Mipping textures efficiently