The game features hundreds of small improvements at all levels: from small 'fixes' in the gameplay to fixes in some of the game's missions, to improvements in some of its items and weapons. In addition, many visual aspects of the game have also been enhanced to make them look more realistic.
Unofficial Skyrim Patch has also been developed to be used in conjunction with many other mods. It's thus fully compatible with the vast majority of the more common mods to be found in Steam Workshop or Skyrim Nexus.
Unofficial Skyrim Patch is a very interesting patch for Elder Scrolls V: Skyrim fans who want to get even more out of this great RPG. The many improvements offered in the mod make it pretty much indispensable.