Textures are like skins to give a different look to a specific object.
Textures could be used on furniture, but also on walls.
Textures could be a bit difficult to learn to control at the beginning, but it is certainly worth it to learn the controls, and it's also not that hard as it might seem.
You can purchase textures at the furniture store for a certain amount of dollar each. In any interior you own, you can acces '/textures' to view, remove and apply textures from specific objects.