To invite Group Members, open WordGo and click on the Group Details button, (second icon from the left at the bottom of the screen). Click 'Add Member,' enter the names and emails of those you want to invite, and click 'Save' to send the invite. 

1. You will need the Group Members' email addresses to invite them

2. If they don't see the invite in their inbox, ask them to check their spam filter.

If you have any more questions about inviting Group Members please raise a ticket here to speak to a WordGo customer support agent.