Use Disqus for comments

Dashboard > Settings > Integrations > Disqus shortname

1. Create a site in Disqus and copy its shortname.
2. Paste it into Disqus shortname.
3. Deploy.

Disqus comments then appear on your posts. You moderate them in Disqus, not in Superblog.

Superblog also has its own comments, with email confirmation and moderation in the dashboard. See Turn on and moderate comments.