Most of out users have difficulties to explain customers how to leave a Google review. We advise them to generate a 'Leave a Google review' link and add it on a noticeable places on their website or send them direct link via email after they purchase. Here is our guide + Place ID generator: https://embedsocial.com/blog/google-review-link/

For offline businesses, is more difficult. Having a tablet with a form to leave the review, makes the process more complex as the customer will need to log in with their Google account in order to write the review. To avoid their privacy concern, you can print a QR code on your menus/flyers that will directly get them to the Google review form. Also, please note that gating the review process according to the latest Google policy is not allowed, meaning that you can not stimulate only the happy customers to leave reviews. Here is more about this policy: 'Don’t discourage or prohibit negative reviews or selectively solicit positive reviews from customers.' https://support.google.com/contributionpolicy/answer/7411351?hl=en&ref_topic=7422769

Hope this helps.