When on a user's profile page, click:

You can also connect directly from the Browse / Search User page:
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When they accept your invitation they will be added to your My Connections page

To invite a friend or colleague

Just enter their email in the box on the top right of the Network Page. Your friend will receive a link that will automatically connect them to your network when the join Audiu.

Connecting with Pros
​Pros become part of your network when you purchase a service off them. You can also invite a Pro to join your network using the invite too, if you have their email address.