The WhatsApp link allows you to be reachable on WhatsApp without the contact opening the link having saved the phone number in their address book. In fact, if the contact has a WhatsApp account, clicking on the link will automatically open a WhatsApp chat with your company.
To create a WhatsApp link you need to use this link :
The <number> section should be replaced with your full phone number in international format. You must not include any zeros, brackets, + or hyphen when adding the number in international format.