> ## Documentation Index
> Fetch the complete documentation index at: https://docs.heyy.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Message & templates

> Set campaign message content and channel requirements.

Campaign content depends on the **channel** you selected when creating the campaign.

## WhatsApp campaigns

WhatsApp outreach usually requires an approved **message template**. In Heyy:

1. Create and sync templates under [**Settings → WhatsApp Templates**](https://app.heyy.io/settings/whatsapp-templates).
2. See [WhatsApp templates](/help/messaging-channels/whatsapp/whatsapp-templates) for approval, structure, and reuse (including duplicate-to-new-version).
3. Pick the template when configuring the campaign message.

Connect a [WhatsApp channel](/help/messaging-channels/whatsapp/getting-started) before sending.

## Other channels

Use the message options your workspace supports for Instagram, SMS, and other connected channels. Channel-specific limits (length, media, templates) apply the same way as in Inbox—see [Messaging channels](/help/messaging-channels/whatsapp/getting-started).

## Automations

To send templates or campaign-style messages from a flow, use [WhatsApp actions](/help/automations/whatsapp-actions) and [Campaigns actions](/help/automations/campaigns-actions) in [Automations](/help/automations/index)—separate from one-off campaigns on the Campaigns page.