You can link your WhatsApp Business account with a Facebook Page and/or Instagram Profile to give your customers an additional way to communicate with your business. If you link your Facebook Page or Instagram Profile with your WhatsApp Business account, your number will show up as a contact option on the linked Facebook Page and/or Instagram Profile. When a customer taps on this contact option, they’ll be able to send you a message directly on WhatsApp.
If you’ve linked a Facebook Page to your WhatsApp Business account, you can also sync business information from that Facebook Page to your WhatsApp Business account. This will automatically update your WhatsApp Business profile with information from the Facebook Page.
Detailed instructions on how to link your Facebook Page with your WhatsApp Business account can be found here
.You can also learn more about syncing information from your Facebook Page to your business profile here.
Detailed instructions on how to link your Instagram Profile with your WhatsApp Business account can be found here.