A business message asset.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v23/common/asset_types.proto)

| Fields ||
|---|---|
| ## `call_to_action` | `https://developers.google.com/google-ads/api/reference/rpc/v23/BusinessMessageCallToActionInfo` A call to action for the business message asset. |
| ## `message_provider` | `https://developers.google.com/google-ads/api/reference/rpc/v23/BusinessMessageProviderEnum.BusinessMessageProvider` Required. Message provider of the business message asset. |
| ## `message_provider_data` Union field. Message provider information to use for messaging. `message_provider_data` can be only one of the following: ||
| ### `facebook_messenger_info` | `https://developers.google.com/google-ads/api/reference/rpc/v23/FacebookMessengerBusinessMessageInfo` Facebook Messenger. |
| ### `whatsapp_info` | `https://developers.google.com/google-ads/api/reference/rpc/v23/WhatsappBusinessMessageInfo` Whatsapp. |
| ### `zalo_info` | `https://developers.google.com/google-ads/api/reference/rpc/v23/ZaloBusinessMessageInfo` Zalo. |
| ## `starter_message` | `string` Required. A welcome message to prompt the user to initiate a conversation. |