Graveyard
The Graveyard is a face-up pile of cards each player has, usually positioned above their Main Deck.
It is where cards go once they are no longer in play, either by being destroyed, discarded, or sent there due to failure to summon.
Unlike other TCGs, there are no effects that activate on the graveyard or ways to recurse cards. In essence, it is the final state of any card on a given game. The order of the Graveyard is not relevant but usually is kept in pile order (new cards on top).
Any player can consult any Graveyard at any time for any reason.