/use
/use
allows you to use items from your inventory or equipped ones.
Examples
/use Juju Flurry
Will use Juju Flurry if it can be found in the inventory.
/use [@player] Runecloth Bandage
This macro will search for Runecloth Bandages in your inventory and if it finds them use them upon your character.
/use [combat] Major Mana Potion
With this line you'll never again use a Major Mana Potion accidentally when you're not in combat!