Fog of War and Grid

Fog of War Who does not know it? Whether the map was included in an adventure or you found a map to match the adventure, as a dungeon master you just don’t want the party members to see everything on that map right away, if only to maintain the element of surprise. Imagine that your party is going through a forest, a cave or a castle. The map is quite big and there is a lot to see, maybe there should be some enemies on there.