I only ever use it for when I take screenshots of my desktop. This is usually to post on GAF, or to crop a diagram from an e-textbook i'm reading in order to insert into an Anki notecard when a graph shows intuitive ways to think about a problem or when I want to copy a bunch of equations that would be either too laborious to type/code in LaTeX or would look too messy.
It's perfect for everyday simple editing tasks.