You can allow your site users to leave comments for each blog article. By doing that, you will engage them even more, and in the result, you will build a strong, dedicated community around your site.
The comments section is powered by the most popular Disqus plugin. You can configure this plugin by following these instructions.
You will be able to manager your comments in admin> Blog> Manage Comments link. In case if it Disqus plugin is not configured, Manage Comments link will rediret you to this plugin's configuration.