Your paper URL is http://paper.li/something but when you navigate to the page, a trailing hashtag or # is added to the end. Why? And how can you get rid of it?
Although you can share your URL without the trailing #, it's added automatically when the page is loaded.
The # is used to allow visitors to navigate from one topic view to another.
In the classic view, a paper view is a single page application. So when clicking on the Politics topic on a paper, for example, to navigate to that view or location, #/politics is added to the end of the URL which allows the correct tab to open on reload.
The portion of the URL to the right of the # is known as the fragment identifier and specifies the correct location within your paper.
Simply put, the # is a way to navigate to topics within the paper view.
The # does not affect SEO. Search crawlers are able to follow urls with # fragment.