When you create a broadcast you will find it listed on the broadcast page. This page gives you an overview of what message was sent, who to and at what time:

It will also show you the status of the broadcast. The status will change to show what's happening with your broadcast. Here is an overview of what each status means:

Scheduled: The flow has not started doing anything with your broadcast; the scheduled date is in the future.

Gathering list of people: The platform is gathering the list of people to whom it will try to send the broadcast; this can take some time to complete depending on how big the audience is. The platform has to check for the various criteria you have set and to whom it applies before the final audience count can be confirmed.

Sending: The flow is actively sending your broadcast.

Completed: The flow has finished sending your broadcast.

Cancelled: The flow was unable to find the audience for the broadcast so stopped trying to send after a number of failed attempts.

Extra notes:

The audience is the total number of people to whom the flow will try to send your broadcast based on the target audience you have set.