There are multiple ways to host virtual conferences with Microsoft Teams: Meetings, Webinars, and Town Halls.
Meetings
Meetings in Teams include audio, video, and screen sharing for up to 1,000 people and a view-only streaming experience for participants over 1,000. Participants don't need to be a member of an organization (or have a Teams account) to join a Teams meeting. They can join directly from the calendar invitation via the Join meeting link or call in via audio if available.
Meetings are generally best for situations where participants need to interact with each other via voice or chat and where multiple people may be presenting. This will be the most commonly used meeting type. Use Meetings for virtual calls with departments, project planning, or other instances where a conversation among the participants is required.
Webinar
Webinars are structured meetings where presenters and participants have clear roles. A key difference between webinars and Teams meetings is that webinars support robust registration management, a customizable event and registration site, and event-oriented default meeting options.
Use Webinar for presenting to a large audience and require the them to register. Only the assigned the presenters will be able to share their video, audio, and screen during the meeting.
Town halls
Town halls are generally best for situations where a limited number of presenters are presenting to a large group of attendees and direct interaction via chat or voice conversation isn't needed. For these event formats, attendees don't use their cameras and mics, but instead use Q&A to engage with presenters and organizers.
Use Town Hall for presenting to a large audience and do not require registration to join. A public link will be generated for attendees to join. Only the assigned the presenters will be able to share their video, audio, and screen during the meeting.
Know the differences