It negates the need for you to upload an image to a hosting site (such as ImageShack etc) totally.
This is how it works...
Go here http://gyazo.com/
Click the Download for free yellow button
Follow the install instructions.
When you have the program installed on your PC, go to your list of programs, find Gyazo, right click and choose 'send to toolbar' or 'pin to taskbar' (whatever message you get)
Do a test run! Find a pic on the net somewhere and click the Gyazo icon on your PC's toolbar/taskbar at the bottom of your screen. Just click once!
You will see a + symbol appear where your cursor is. Click and drag the + to highlight the part of your screen you want to 'capture'
Once you release the mouse click, wait a few seconds - a web page will open up in a new tab and your image will appear.
Simply copy the URL at the top of the page and paste it into your post. People can click on it and see what you posted. If you want to insert an image in a forum, don't use the URL, right click somewhere on the image and select 'copy image location'. You can then paste that link into the img shortcut up there ^ in blue and voila!
It's not high-definition, of course, so if you're going to want that, continue to upload your photos as you normally would. Gyazo is a quick and easy means of showing something that doesn't need to be high def.
For example: http://gyazo.com/1cb570fe66b331ea702f774b567653ce It even shows you the pixel dimensions as you click and drag so you can get an idea of how big the image will be.
http://gyazo.com/000faf4ba59256f99978fcf5286e2cc9
Anyway, those of you who love the forums and Skype or use Facebook or Tumblr or Twatter (LOL), this makes the process of sharing pics incredibly simple, so go to town and by all means use this thread as a practice 'sandpit'
Shazz