Sand Dunes
This is a sandy ground with a lot of dunes.

If you are texturing a desert, it is the go-to material.
 
Sand and Beach
It is a sandy ground which is good for texturing beach and desert. Due to the wind effect, waves appear.
Sand Ground with Wavy Pattern
That is a sandy ground such as beach. It has wavy patterns due to wind. Tiny pebbles can occasionally be found.

Simply put on this texture on a flat surface, you will have a beautiful beach!