Audiences
An audience, also called a contact list, is simply a group of people. When you send a campaign, you choose an audience to decide who receives it. No audience, no recipients: the audience is the "to" line for your message.
(Screenshot: a list of audiences)
What an audience is for
Think of an audience as a saved guest list you can reuse. Instead of picking recipients one by one every time you send, you point a campaign at an audience and everyone on it gets the email.
Because it's saved, you can send to the same group again and again, a reminder this week, a thank-you next month, without rebuilding the list.
How audiences get their people
An audience can be built from the people connected to your event and from contacts you've gathered over time. That often includes the people registered for your event, so you can reach your attendees directly. To see and manage those registrants, visit Attendees.
You can keep an audience broad, like everyone attending, or narrow, like a specific group you want to reach with a tailored message.
Choosing the right audience
Match the audience to the message. A change to one session only matters to the people in it, so a smaller, focused audience keeps your emails relevant and welcome. A general announcement can go to everyone.
Sending to the right people, not just the most people, keeps your emails welcome and your unsubscribes low. See Deliverability for why that matters.