In World of Warcraft, the user Interface (or abbreviated as UI) is a very special feature or even a cool tool that allow all its users  to tweak and customize the User Interface as they wish.

Within UI, users can also see many useful and important things in front of them, while playing the World of Warcraft game such as their own character portrait, pet portrait, party member portrait, spell and ability icons, talent icons, minimap, chat log, combat log, action bar, pet action bar, interface panel and so many more. All of these can be easily modified or adjusted to better suit the users’ own specific needs as much as possible.

Furthermore, Mods and Add-ons are also very popular to be used to add a set of extra and new functionality to the already existing user interface to better fit in their style of playing the World of Warcraft game.