It is a popular patience game that is played with two decks of cards.
The main purpose is to remove all cards from the table.
See the rules for more details:
You can move a card to an empty column, or on a greater card (whatever the color).
But you can only move a set of cards provided the cards have the same color and the correct order.
A complete suit of cards gets automatically removed.
At any time, player can use the remaining stack to add cards on all columns.