Freecell solitaire is somewhat unique in that it’s one of the few solitaire games where you start with every single card visible.
Free Cell is played with one deck and begins by dealing cards to eight different piles on the tableau.
You then have 4 foundation piles (one for each suit) and 4 free cells (though some games will let you change the amount of free cells).
You can put anything in a free cell, but you can only move it out of the free cell if it’s a legal move.
Only one card can be moved at a time, so you can strategically use your free cells in order to move sequences of cards.
Much like Klondike, you win at Freecell when you build all four foundation piles in ascending order from Ace to King, by suit.