The feature to invite people by email is only available to Managers and Admins.

If you want to invite one or a list of specific people through email to join, this is the easiest way to do it.

Just press the + button in the header and then "Invite". There you'll find a section named "Invite with email". Type or paste the emails you want to invite and click "Invite".

The people you just invited will now receive an email saying that you invited them, with a link that will bring them direct to your home page.