To make it easier to tell which circle you're viewing. It would be especially helpful on mobile, since the circle's name and info are only located at the bottom of the page.
You can suggest features and other changes to the site here.
Please try to be specific, and check to see that no one else has made the same suggestion.
If you're not suggesting a feature so much as a change to how the site was made to function, or suggesting a change to the rules, guidelines, or mission of the site, (ie Philosophy of Ovarit posts) use /o/Ovarit.