How to make the texture not lose quality

I have a cement wall texture thats all good and all but when i make the wall a little bigger with the cement texture on it it looks pixelated and its bugging me out because i want my game to have good graphics answers are appreciated alot!Thanks.

You need to use Tiling in your material: Coordinates Expressions | Unreal Engine Documentation
If you increase the Values for U and V on the texture coordinates node, your texture gets tiled accordingly. Hope this helps