What is Disqus?
Disqus is a free commenting platform that can be integrated with your site, allowing users to comment on blog posts.
How to Set Up Disqus
First, visit the Disqus site signup page here. The unique Disqus URL that you provide during the setup process will be your site's Shortname.
Next, go to Admin > Settings > Integrations (Disqus Shortname) on your site. Enter your Disqus Shortname into the text box: