Zone

Each place on the Battlefield where a card can be located.

Typically at most one card can be on each zone (except for attached cards that are placed underneath other cards, such as Equipments).

Zones are considered controlled (i.e. belonging) to either player, depending on which half of the battlefield they are.

Zones can be conquered (active) or inactive. All artifact zones are automatically conquered. Typically, you can only Summon or Set cards on conquered empty zones you control matching the Card Type.