Enable/Disable Comments for entire Site
You can entirely disable comments on your site by toggling the Enable/Disable¬†link in the Comments¬†box on the Theme Options¬†page.¬† This will remove all references to comments on your site.
Control Comment Moderation and Notification
To control the settings for approval of comments, click on Discussion¬†under the Settings¬†tab on your dashboard.¬† By default, all new sites are set up with moderated comments.
To approve, edit, or delete¬†comments, click on the Comments¬†tab on the left side of your WordPress dashboard, and then click the links for each comment to Approve, mark as Spam, or Delete.