Some blogs and webpages have obnoxiously long pages that go on forever... and that's where this widget comes in handy. As you can see, there is a small floating arrow at the bottom-right of this page. It always maintains the same position. Scroll down a little in your template, then if you click on it, it will take you to the very top of the page.
Why it's a good thing?
* Saves your visitors from an unnecessary hassle of scrolling up.
* The icon does not interfere with your content.
* You can use your own image in order to blend in with your own blog.