In World of Warcraft, addons are little bits of code that allow you to do repetitive tasks, keep a database of information, and change the user interface (UI). These addons are free of charge (although you can still donate).
Wow interface is good for beginner and curse is the website you use to find addons
World of Warcraft, or WOW, addons have different benefits, for the most part, the addons allow players a better gaming experience. WOW addons can be used by players to customize the look of their game as well as enhance player performance in the areas of questing, gaining skills, obtaining achievements, and running dungeons and raids.
Download a wow addon manager like wowmatrix. Google Wowmatrix --- Inside your World of Warcraft game folder you will find a folder called "Interface". Inside is a folder called "Addons". Addons provided on abovementioned websites usually come zipped, with the files in a folder with the addon's name. Simply copy this folder entirely into the "Addons" folder. Make sure to quit WoW and restart it. At your character selection screen, at the bottom right, is a button "Addons". Click it to see a list of addons you are using. Make sure all addons you want to use have a tick in the box, and that the box "Load out of Date Addons" is ticked, in case you installed an older addon. Log into your character, and the addon should now be active.
They are addons for a specific class that you play. I play a priest so I get addons specifically for priests to make it easier for me to play my class.
No, most addons will not get you banned. The only things that addons are allowed to do in game are approved by Blizzard. If Blizzard does not want an addon to do something, they just make it so that addon can not do it.
Depends on what kind of addons they are. You don't need Cataclysm for alot of them, though.
In order to manually install an addon, first download the addon and unpack its zip file. Everything contained inside the zip file should then be copied into the World of Warcraft\Interface\Addons folder. When you start up World of Warcraft again, click the "addons" button at the bottom left of the character selection screen and make sure that the addon is there and the box in front of it is checked. The addon should now be running properly. If the addon has not been updated for some time, you may need to click the "load out of date addons" option for it to work, but this increases the chance of the addon causing errors.
You should download the curse client and download the addons via that, on my computer the addons automatically go to the WoW addons folder located in the interface section of the WoW folder.
Yes, you can use any addons that a full account can use. There is no limit.
The gaming engine used in WOW is a proprietary engine developed by Blizzard Entertainment, and uses C (or C++). The scripting language for addons and scripts is called Lua.
No - all WoW addons require registration ($) and the previous addon: WotlK requires The Burning Crusade, The Burning Crusade requires a registered version of WoW.
Most likely this is an "old" version of QuestHelper - WoW thinks it is old, when it's the most up to date. There is a setting in the addons dialog window, "Load out of date add-ons" - click this but beware, you are increasing your chance of having problems.