If you have a google account, press the button

Leave a review without using a Gmail account

It’s easy

Create Account botton.

They can choose, for myself, and click on that.

Instead of creating a Google account, they can simply use an existing

Use my current email adrdress

Upon clicking that, now it asks them for their existing email.

Indicate the password and confirm

You just click the next button. At that point, Google will send a confirmation