An update on the official Portal 2 blog announced that the Steam Custom Workshop is now available for The Elder Scrolls V: Skyrim. What does this mean for you? Well, to quote the blog, it means that you can now publish and download mods into Skyrim. They have also included a mod related to the ever-lovable Space Core, ripping down any kind of fourth wall the game had and giving you the space-obsessed little guy as a reward.
Speaking from personal experience, I found that the modding community is what turned Oblivion, Skyrim’s predecessor, into a true masterpiece. Anything which can be done to make that functionality more user-friendly in Steam is a plus in my book, and should be in yours too.
Source: Portal 2 Blog