If you’re using the WhatsApp Business app, you can share a short link with your customers that they can use to start a chat with you.
A short link for your business is automatically generated when you create an account on the WhatsApp Business app. To access this short link:
Tap Short Link.
The short link will be displayed under your business name. Once you’ve accessed your short link, you can:
Tap Copy Link if you wish to copy the short link and paste it somewhere else on your website or other Facebook pages.
Create a default message - You can also set a custom message that customers can send you when they open the short link.
Note: Your customers will be able to edit the default message.
About short link on Android