I will show you two examples of an article I was reading. The first is without Clearly:
As you can see the page is fairly cluttered and full of ads and other content that distracts from the main article.
The second image is much cleaner.
There are four buttons along the right-hand side. They are (top-bottom):
- Hide the overlay
- Clip to Evernote
- Show Themes (allows you to change coloring and text size)