Texture simply means how something feels when it is touched. If you touched a piece of marble, it might feel smooth and cold. A piece of wood would feel rough. A piece of cloth or a tapestry might feel rough or smooth.
Artists use texture in their art to help tell a story and to add dimension to a piece. When you see a piece of art, the texture can add to your enjoyment of the piece if you are able to touch it. Texture can make a work of art more interesting.
From: https://study.com/academy/lesson/what-is-texture-in-art-lesson-for-kids.html