Follow the instructions below to install the Walution add-on from the Google Workspace Marketplace. The Walution add-on allows unlimited Whatsapp messages to be sent.
Click on Extensions > Add-ons > Get add-ons.
Type Walution in the search bar and press Enter.
Click on the Walution tile from the Search results.
Click on Install and follow the steps that appear on the screen.
You will be asked to grant permissions, and to associate the add-on with a Google account.
Click on Done to complete the installation.