Cockatiel feather molt

Well I have heard people talking about their birds molting. I am unsure about what this means and I dont know if there is anything to do when my bird molts. Also, what are the signs of molting?can someone reply asap please

When you find complete body, wing, or tail feathers that have fallen out from the parrot on a regular basis. It won’t happen all at once, but usually a few feathers a day for a few weeks or months straight. When they molt wing primaries, you’ll see a gap in the opened wing and the symmetrically opposed feather missing on the other wing as well. Then you might see new feathers growing in their place. Birds will go through moody/happy phases in the course of the molt. They should be provided with better nutrition during this stage and ideally natural sunlight to improve the plumage.