WhatsApp Settings is located on the campaign listing page and allows you to manage account integrations and messaging preferences.
Click the Settings button to proceed. 
Account Integration
Account Integration allows you to check and manage your WhatsApp account’s related information easily. Also known as the WhatsApp Account Hub, it includes the Official Business Account (OBA) application, status tracking, phone quality rating, messaging limit management, and profile picture updates for each account.
To add multiple phone numbers, click the +Integrate Account button. You’ll need to complete the integration process individually for each number.
Refer to Multi-Number Support on a Single Panel for WhatsApp for further information.
Under the Actions column, you can configure messaging preferences, keywords, auto-replies, short URLs, and API settings for each account.
Account Preferences
The Account Preferences page enables you to customize key messaging behaviors, including setting opt-in keywords, confirmation messages, and automated replies to unexpected messages.
Click the Account Preferences icon to proceed.
Subscribe
The Unsubscribe Keyword applies globally across all numbers, while the Subscribe Keyword can be customized per number. You can define a unique keyword for users to opt in and set a confirmation message to approve their subscription.
To set your unique Subscribe Keyword, enable the Subscribe toggle. Enter your Subscribe Confirmation Message, and after setting your Subscribe Keyword, you can preview it.
Unexpected Messages
You can reply to users who write to your WhatsApp account using unexpected messages and redirect them to a support channel.
To use the Unexpected Messages feature, enable the Unexpected Messages toggle and create your message.
When the user sends another unexpected message within an hour, they don't receive the auto-reply message. After an hour, they can receive the second auto-reply message.
The unexpected messages feature is inactive for you if you use WhatsApp Conversational.
Short URLs
You can enable the Enable Short URLs checkbox and shorten URLs in your messages to avoid making them longer in your unexpected and confirmation messages.
Account APIs
To configure your API Management, navigate to the Account APIs under the Actions column.
You can set different webhook URLs per number for WhatsApp Conversational, Transactional, and Verify API (OTP) use cases.
Important:
When you change your webhook URL, any existing chatbot or automation flows connected to the previous webhook will immediately stop working.
Changing the webhook effectively disconnects your previous bot logic. Before switching, ensure that the new webhook is fully configured and includes all required handlers to process incoming requests correctly. This prevents message delivery issues or automation failures caused by missing event handlers.
Unsubscribe
You can set a keyword for recipients to opt out of receiving messages, along with a confirmation message to acknowledge their unsubscription. The Unsubscribe Keyword applies globally across all numbers.
To create your Unsubscribe Keyword and Confirmation Message, enable the Unsubscribe toggle.
Since Meta does not allow footers in Carousel templates, you can include your Unsubscribe Keyword directly in the message body so recipients can easily opt out.
The keyword used for unsubscription in WhatsApp settings and the end-conversation keyword in Mindbehind chatbot settings must be different. If the same keyword is used for both, the user will trigger unsubscription while simply trying to end the conversation. Therefore, these keywords should always be set differently.