These function like small floor mats covering and protecting the bottom of the center console in 2 areas.  The benefits that these liners have are that they make it easier to clean up spills, and crumbs.

They prevent scratches from loose objects like coins or pens.  They prevent objects from sliding around making it easier to locate objects you could have stored. 

In our photo gallery there are 2 videos that explain how the install.  One for under the front sliding tray and one for under the armrest.