There are multiple roles available for a meeting: host, co-host, alternative hosts, and participants. The role that you have in a meeting is designated by the host.
Host: The user that scheduled the meeting. They have full permissions to manage the meeting. There can only be one host of a meeting.
Co-hosts: Shares most of the controls that hosts have, allowing the co-host to manage the administrative side of the meeting, such as managing attendees. The host must assign a co-host during the meeting. Co-hosts cannot start a meeting. If a host needs someone else to start the meeting, they can assign an alternative host.
Alternative hosts: Shares the same controls as co-hosts, but can also start the meeting. Hosts can assign alternative hosts when they schedule a meeting. Assigning someone as an Alternate Host in Zoom Article