https://www.gamespot.com/articles/e3-2018-fallout-76-lets-you-build-portable-bases/1100-6459649/

Bethesda shared a ton of new details about Fallout 76 during its E3 2018 press conference. On top of confirming the game will feature online play, the publisher revealed the game will bring back building elements. During the game, players will be able to set up a bases anywhere using an item called the Construction and Assembly Mobile Platform, or CAMP. These can be placed down in the world and allow players to construct an impromptu camp.

In the video clip shared during the press conference, we got to see the player laying down walls and decorating the base with pool tables, toilets, and other household objects. Your CAMP can also be picked up and relocated, allowing you to build up a base anywhere in the world.