What's the difference between a camera bracket with one leg and a bracket with three legs? What is better?

The tripod can be supported independently, and the monopod needs people to hold it, so the tripod is more stable (it is recommended to use a tripod for landscape photos or long-term exposure), and self-portraits/photos and even star tracks are fine, but it is a bit troublesome to store, and it is bigger and heavier than the monopod. The one-horn bracket is convenient to lift and leave, and it is widely used for short-time exposure, which can reduce the slight shock when holding the machine. In many cases, it can take many photos from different angles by remote control, and some can also be used as crutches. It is suggested to have a tripod before considering a monopod. Many tripods can remove one foot to be used as a monopod.