
Step 1 of the Calendar wizard asks for a name, a duration and a form — and two other things that are easy to skim past: Host and Meeting type.
They decide whose calendar a booking lands on and who else is in the room. Both default to something sensible, which is exactly why nobody notices them until a booking turns up on the wrong person's day.
It picks up from Create an Event in the Calendar.

Host, with the line that explains it: whose calendar gets booked.
The field says what it does in one line:
Whose calendar gets booked. Defaults to you.
So a booking link is not generic — it belongs to a person. The times an invitee is offered come from that person's weekly hours, and the meeting lands on their day.
Most of the time the default is right and you leave it alone. It matters when it is not:
Two options, and One-to-One is the default.

One-to-One: “Just you and the person who books.”
That is the whole of it — the host and the invitee, nobody else. It suits most discovery calls, demos and check-ins.
Switch to Group Meeting and two more fields appear.

Group Meeting adds Participant Users here, and Participant Contacts alongside it.
Everyone below is invited alongside whoever books.
The phrase doing the work is every booking on this page. These are not people you add per meeting — they are added to everything booked through this link, from now on.
The practical test: if the same colleague should be on every single call booked through this link, list them. If it varies, leave it One-to-One and add people to individual meetings afterwards.

On the record the field is called Meeting Format, and offers the same two values.
On the meeting record the field goes by a different name: Meeting Format, offering None, One-to-One and Group Meeting. A booking arrives with it already set from the event, and you can change it on an individual meeting without touching the link.
Worth knowing, because searching a record for “meeting type” leads you to a different field entirely — Meeting Type on a record is the Demo / Consultation / Follow-up classification, covered in Meeting Status & Venue.
Meetings you create by hand have both, in the PEOPLE section of the form.

PEOPLE: Host, Meeting Owner, and the two participant fields.
Usually host and owner are the same person, and on a booking they arrive that way. They come apart when somebody books on a colleague's behalf, or when a coordinator owns the admin while somebody else runs the call.
Then carry on to Set Your Availability for Bookings, which decides when that host can be booked.
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