Takes away the excess moisture in the air to starve moulds, fungus, mildew, etc and so they stop growing and spreading more onto your walls, ceilings, floors, windows, and belongings…
And so they don’t damage your wardrobe, furniture, books, and gadgets and don’t trigger or worsen allergies.
Takes up less than one square foot of floor space only so it doesn't cramp rooms.
You can even park it in the corner since it doesn’t occupy much space.