Creating broadcast lists on Android devices
In your WhatsApp Business App, go to the three dots in the menu.
Now, choose "more options". Select the option "new broadcast".
Here, you can either search for contacts or add them manually to your broadcast list.
Once you selected all contacts, tab on the check mark to finalize your broadcast list.
Creating broadcast lists on iOS devices In the Business App, go to "chats". Go to the "broadcast lists", and then select "new list".
Now, you can insert contacts through the search feature or manually. Tap "set up" to finalize your list.