For Fallout 4, our goal was to make Mods easier and more accessible than ever before – for both the creators and the players. By building an all-new system with Bethesda.net we’ve made a huge leap forward in achieving that.
You can now browse and search for the latest and greatest Mods, choose your favorites, post feedback, and install them – all within the game. Simply select Mods from the main menu, and start browsing.
For console players, Mods will be coming to Xbox One in May and PlayStation 4 in June.
https://bethesda.net/#en/events/game/fallout-4-creation-kit/2016/04/26/114
You will need to have Steam Beta update 1.5 to access Bethesda.net mods in game.
You can get the Creation Kit at the following link by downloading the Bethesda.net Installer:
http://download.cdp.bethesda.net/BethesdaNetLauncher_Setup.exe