Join before host allows attendees to join the meeting before the host joins or when the host cannot attend. When you are scheduling a meeting as the host, you have an option to enable join before host in the Schedule a Meeting settings.

Can participants join before host?

The allow participants to join before host feature permits attendees to join the meeting before the host joins or when the host cannot attend the meeting. If you select this option, then the participants can join the meeting before the host joins or without the host.

Does Zoom tell the host when you join?

Zoom hosts can receive an email notification if participants have joined the meeting before the host. The notification email will prompt the host to join the meeting.