It is quite a simple tool to use. The beauty of this tool is that it allows you to take screenshot of any part of the webpage in the form of an ImageMap. This means the portion sut out from the webpage is retained with all its hyperlinks intact. Simply paste the link of the website you want to quote in the space provided and there it goes to display the mentioned website/ webpage for extraction.
Now, with the introduction of 'kwout everywhere', it surely helps quote anything on the website (blog, etc.) much easier and with a purpose. Look out for kwout everywhere on this blog of mine as well.