I'm a product designer. I spend a significant amount of time taking screenshots—dropping them in Figma, slacking them to PMs and annotating them for engineers. The tool keeps screenshots suspended on your desktop until you decide what to do with them—save, annotate or copy it to clipboard. It doesn't save the screenshots if you don't want it to, so it prevents a ton of clutter.
Not to mention it has video recording that I frequently use to create video walkthroughs for features I'm working on.
The tool is a pretty expensive Mac App, but worth every penny.