Contact Groups allow you to send emails, SMS, or schedule calls and meetings with multiple people together who fall under the same category.
For example, you want to schedule a meeting with all business partners with whom you have partnered in the past 6 months. Or you want to send a system update email to all your customers of your every product who have been using the product for the past 1 year.
You can bulk email the Contact Groups through our “Email Campaign” Add-on.
Here’s the documentation of “Email Campaign” add-on:
Regarding exporting Contact Groups, you can only export Contacts/Companies/Employee through this:
wp-admin -> ERP Settings -> Tools -> Export.
Here’s the screenshot: https://prnt.sc/k6kyu0
Hope this will help you out.