Multiply
The Multiply Texture is used to multiply the values of texture or colors together, as in Photoshop or any other painting or compositing applications. There are only two options in this node: Texture 1 and Texture 2. Both must be used to see the effect.
How to Use
Open the Node Editor and prepare the setup as you see in the image below. Here, two different textures (marble and checks) are used as inputs to the "Multiply Texture" node. The in-between gradient nodes are used for different purposes.