Link to Game
Each Warzone game has a unique URL that uniquely identifies it. The URL looks like this:
https://www.warzone.com/MultiPlayer?GameID=1234567
It can be shared with other players or posted on the forum which helps when discussing games.
Whenever you open a game on the Warzone website, that game's URL will appear in your browser's address bar. It is also under Game > Settings > Full Settings > link.