You can make your WordPress blog commenters get automatically redirected to a page of your choice after they finish up posting their first comment. This feature is useful when you want to offer registration, email subscription, follow on social media or for saying a simple thank you to your commentors.
Install and activate Comment Redirect by Yoast.Com. It will show up “Comment Redirect” options panel in the settings page from where you can choose the redirect page you want and save your settings. That’s all.