This is an altar mat to be placed in the center of the altar. Its purpose is to define the space where spiritual energies are going to be vibrating. In most of the spiritual traditions we empower an altar by calling or bringing in the energy of the directions. It is believed that each direction has its spiritual properties and its spiritual guides. In the Mexican tradition there are seven directions and the order of calling is East, West, North, South, Above (Creator), Below (Mother Earth), Withing (Heart connection to all the directions).
Note: The sizes may vary a little bit because these altar mats are hand-made. The variation is insignificant.
Watch this video for a suggestion on how to use it