A 'Trusted Email Domain' allows the admin team to fast track signups of new members.
For example, if you added '@mye-coach.com' to the trusted domains list, anyone who signs up with their email address domain as '@mye-coach.com' will be automatically accepted onto the system.
The user will still have to verify their email address before they can access the system, but they will not need to be approved by the admin team.
This should only be done for company domains, and not private email domains, like '@gmail.com' or similar, as this would be a security risk.