Microsoft Teams live events are an extension of Teams meetings which provide the capability to stream an event to large online audiences (up to 10,000 people).
Please note that these events are a 'Town Hall' type of event with much more structure and coordination required. There are 3 key roles: Producer, Presenters, Attendees. The links below get into some of these details at a high level. It is highly recommended that a couple practice sessions are done in order to have a quality event.
Here are a few key components to get started with these events: