Move all the cards to the Foundation (upper right). When 'Relaxed' switch is on, you only have to move all the cards on the table (tableau) to win.
Only the exposed (uncovered) cards on the table may move. You can move cards to the Foundation by dropping a card on another exposed card. If the ranks combine to 13, both cards will move to the Foundation. Kings, being ranked 13, move to the Foundation immediately upon being touched.
You may go through the Stock 1 time or 3 times if the 'Easy' switch is on.