Not a dumb question at all.
Wet mash is simply their regular feed mixed with enough water to make a "mash" the consistency of cooked oatmeal.
Pellets and crumble absorb the water in about 5-10 minutes so it doesn't take long to make at all. For whatever reason many birds prefer their feed this...
I also recommend trying a wet mash. Mine eat that before eating pellets.
Most of my flock will choose to eat their daily mash before even eating any if the scratch.
I feed mash daily since I have a cross beaked bird who needs her food that way.