you like. Once done, you get passed through to the editor where you find lots of useful tools.
These tools range from the classic coloured markers, to object tools for arrows etc, to text editors complete with an underline function. Each of the tools, including one to 'censor' the images, is designed to work perfectly with screenshots.
Skitch is a great tool that will work well for anybody who wants to make screenshots on their PC and then edit them. Once done, you can upload them automatically to the Internet.