Texture refers to the surface finish of anything. It is the unique physical structure of something i.e. size, shape, feel of its parts. Texture is generally the look and feel of a substance.
There are two kinds of textures:
Tactile Texture: Tactile texture is the actual feel of the surface. Tactile means touch and is very important for three-dimensional design. The actual surface texture needs to either be felt, or seen with gathering across its surface to make the texture visible.
Visual Texture: It is the texture that appeals to the eyes. It is the illusion of the surface’s texture. In 2D art the illusion of texture is more important than the tactile texture.