Head to supple: https://supple.com.au/tools/google-review-link-generator/
Here you can type in your business name. Once you have confirmed it is correct, scroll down to the short URL option and click copy.
Test this copied link in a new window or tab, it should show your google business listing, and pop up with an option to review. If this is correct, copy the URL from the NEW window or tab, which we can take back to your campaign.
Here we click on marketing, then campaigns, where we can edit our messages/emails to clients. Paste the URL at the end of your message. You can send a test message to yourself to confirm how this will look for your clients.
Remember to save your changes, and then click publish.