
Hey look, a link to an image I captured and uploaded in two seconds, and you don't have to use an extra step to view it!
Really though, yes, Gyazo is very useful.
But you know what's even more useful?
One of the many programs that do the same exact thing as Gyazo, but allows viewers to view the images without requiring them to do an extra step.
A friend showed me
ZScreen 4 years ago, and I've been happy with its abundance of features (saving a local copy, sorted and named by date/time is especially nice) but the only problem is that is does a ton more than just screencapping images, and as such the UI is filled with a ton of stuff you don't need, and finding the relevant options can be annoying.
And of course there's a ton more, a google search for "programs like gyazo" or similar should bring up a lot of results, or there's the links to ones that people have posted in this thread.