You can change your WhatsApp Business Profile Picture, add business description, website, email address by following these steps.
- On the WATI dashboard, head over to 'Settings' on the top panel
- On the next page, click on 'Change Profile Picture'
- Add remaining details such as Business Address, Description, Website & Email Address
- Click on 'Save Changes' at the bottom of the page
Note: WhatsApp does not allow change of "Display Name" after your account is approved.