Q Bugging or Quest Bugging Andariel was an important thing to do pre-D2R.
Basically, when you kill a boss for their quest, they have better loot than normal. (I know there's more to it than this, just giving a simple explanation.) However, once you complete the boss's quest, the boss reverts to the normal, worse loot conditions. This is a bit of waste because most characters playing through the game won't have the MF to make use of this one-time buff when killing bosses for the first time.
When quest bugged, bosses always act like you have the quest to kill them, even if you don't, meaning better loot plus the ability to farm that better loot with higher MF. Andariel was a popular boss to qbug because her qbug was permanent and easy to accomplish, unlike some others.
However! In D2R, you no longer have to quest bug Andariel. Blizzard set her to always bugged, essentially .
Winterkill
262