The World Map is a feature in the Alliance DLC. It provides an overview over the controlled areas of each faction, gives details for each ongoing battle, lists the current and previous missions, and shows the war goal progress of each faction. The world map is the place where players can choose in which battle to deploy, spend their gold, and where leaders can vote to attack new areas.
You can earn coins from each match (up to 200 per match) and you can spend them on the world map for various actions to help your faction. Each action also grants you faction reputation equal to 2.5 times the coins you spent.