You can choose to have a third-party plugin to manage comments on your blog articles. The settings for this are in the left column, under "News Settings." Here you'll see the default Disqus embed code that allows website visitors to comment on your articles. You will need your own Disqus account to manage these comments.
Clicking "News Comments" will take you to Disqus (or your preferred third-party vendor) to manage the comments that appear on your website.