A tripod is an item for a camera to rest on. This way, you can take stable vibration-free images. There are various tripods among which monopods, GorillaPods, stabilizers, and tripods. Which one suits you depends on the situation you want to use it for, the camera you have, and the desired working height. A monopod is useful if you move a lot, for example. You can attach the flexible legs of a GorillaPod to anything, so it's versatile in use.