How do I send WhatsApp notifications for contact persons?

Here’s how you send Whatsapp notifications for your contact persons:

Go to Sales on the left sidebar and select Customers.
Select the customer for whom you want to enable WhatsApp messaging.
Scroll down and click the Gear icon next to the contact person and select Edit.
Ensure that the customer’s phone number is right and begins with a proper country code.
Mark the option WhatsApp under Communication Channels.
Click Save and WhatsApp will be enabled for the contact person.