Redeem the code online and accept the platform services agreement, then download the game (may require significant storage and broadband). Note that additional hardware, a platform account, or subscriptions may be required for online play.
Worlds are described as effectively infinite and different each playthrough, featuring varied biomes, resources, and mobs to discover, plus the ability to travel to dangerous alternate dimensions.
Many editions support local and online multiplayer and cross-device play. Community servers and private-server subscriptions let players join shared worlds, while some console online features require platform subscriptions.