Provide contacts more options to manage their content subscriptions.
By default Groundhogg offers a global unsubscribe option to contacts to opt out of all email communication.
You may not want this because you send email based on a variety of subjects and you want customers to choose which topics they receive emails about.
With this extension you can extend the preferences center to allow contacts to opt out or opt into specific tags which you use for segmentation or different topics. You can also allow contacts to opt out of funnels they are active in.