Q:
Assigning stats to equipment - how?
It means you have a piece of the old Magic Find gear. They did away with Magic Find on gear a while back and replaced it with account-bound MF. Somewhere your character has one or more pieces of armor, weapons or trinkets that used to have MF as one of the stats. You’ll need to hover over all your gear (don’t forget underwater gear as well) until you find one with no stats. Then click (or double-click, I can’t recall the exact process) on it to bring up a list of stats you can assign to it from.