Leveling is important in a Fallout game, but changes have been made to Fallout 76 for player progression. Specifics for each zone haven't been mentioned except for the cranberry bog zone, which is said to be incredibly difficult. Players are free to wander into any zone at any time, but expect to face a difficult challenge if you end up in an area that is a higher level than your character. The map is divided up into six different zones, each with their own difficulty. All NPCs will be robots or other non-human characters. That said, any time you see another human walking around, it will be another player controlling it.
Seeing as how the Fallout 76 map is four times the size of Fallout 4's, that means this isn't going to be a crowded world. In terms of the Fallout 76 world, there is a max cap of 24 players on a given map and a max player group size of four. Fallout 76 doesn't have a level cap, and only 24 players can be on a map at one time Bethesda
