Light stands come in a couple of variations. One is a tripod-like with three legs, like the one above. And there is another type called a C-stand. The C-stands look to me like they are very sturdy; and the prices reflect that.
I got mine in a kit, as I say elsewhere, and I got the very same when I bought the background system later.
A stand I will like to have added to my studio equipment is one or two stands, that is adjustable from 24cm to 42cm. It could be useful, casting a light on the background, hiding behind the subject. Maybe a colour from a snoot or from a barn door or a strobe head with a standard reflector throwing light on a white background to get the High key effect.
Booms can be attached to a stand, and is really practical if you, for example, want to have, let's say a soft box, hanging from above, and spreading light downwards. They are useful for table top arrangements and good at lighting if you are to make some aquarium shots. They are kept from not falling over, by a counterweight. This can be a metal block, or a simple sandbag.
Some can hold a reflector, what could be practical if you need a pair of hands.