> ## Documentation Index
> Fetch the complete documentation index at: https://plain-docs-orca-916-agent-docs-restructure.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Broadcast audiences

> Filter customers into a list of Slack channels, then drop individual channels from this broadcast.

The **Deliver to** section on a broadcast is where you build the audience. You add filters, Plain resolves them into a list of Slack channels, and you can drop any channel from the list before you send.

## Add filters

See [Broadcast audiences](/product/broadcasts/broadcast-audiences) for the full detail. In short:

* Add filters on **Audience**, **Channel**, **Channel name**, **Tenant**, **Tier**, or any visible **Tenant field**. A [tenant](/product/platform/tenants) is a customer account in Plain, a [tier](/product/platform/tiers) is the service level you put it on, and a [tenant field](/product/platform/tenants) holds your own data about it.

* Plain resolves those filters into a list of Slack channels and shows you the channels, and the customer behind each one, as you build.

* Uncheck any channel in that list to drop it from this broadcast only.

* Save a filter you'll reuse as an **Audience**.

The count above the channel list is how many channels receive the message, after exclusions.

A broadcast with no filter at all reaches every customer with a connected channel. Plain shows the count before you send, so check it before confirming.

## Exclude individual channels

Filters describe a rule. To send to everything the rule matches except a few named channels, exclude those channels on the broadcast.

In the **Deliver to** section, uncheck any channel in the resolved list. An **excluding N** pill appears next to your filters, and the count above the list drops.

Two things to know:

* Exclusions belong to the **broadcast**, not to the audience. Excluding a channel here never changes who the audience reaches elsewhere.

* Unchecked channels stay visible in the list, so you can check them again.

Clear the **excluding N** pill to restore every channel at once.

## Resources

* [Broadcast audiences](/product/broadcasts/broadcast-audiences): every filter dimension, how filters combine, and saved audiences
* [Send and schedule a broadcast](/product/broadcasts/send-and-schedule): the next step, review and send
* [Write a broadcast](/product/broadcasts/write-a-broadcast): the message itself