Auto Inventory Macro
This is one of the easiest and most basic macros but one of the most essential in my opinion. What this macro does is uses the ingame command to place any items on your cursor into your inventory. If you're doing a quest or something like that which hands all of your character an item pressing this macro will throw it right in your inventory where it belongs!
The ingame command for it is /autoi or you can type the whole thing out if you feel so inclined: /autoinventory