What does this mean and what's it used for?
http://prntscr.com/bos23uIts a Link that leads to "Lightshot" -an Internet Service- similar to tumblr, imgur, etc., where a screenshot of a monitor or device's screen can be uploaded to, so that other people later can look it up after they had clicked on the provided link.
Its not much of a rocket science... . Hope it does help, though.
Yes, I got that part. I'm just asking what's on the image.