The meeting creator can grant collaborator status to any user role (Administrators automatically have these permissions for every meeting).
Member (User role) + Collaborator can do the following things within a meeting:
Build Agenda
Edit Agenda
Add Poll
Send Message to Meeting Members
Add Supplemental Documents
Add Tasks
Update RSVP’s
Take Attendance
Take Minutes
Edit Minutes
Send Meeting Summary
Meeting items that cannot be changed by a Collaborator:
Meeting Date
Location
Description
Meeting invitees
Create Follow Up Meeting
*If you need a Member or an Observer to be able to perform these actions consider making them a Group Owner.