When a file closes and a client provides us with glowing feedback, we respond by thanking them for their feedback and asking them to provide a Google rating or review. We have been doing this for about a month, and so far no one has provided any reviews or ratings. Likewise, we previously had customer survey at the end of files (to establish a NPS), but no one completed them... Are there magic words or a better time in the process to improve engagement?
I somewhat disagree with the other answer posted here. When the communication is active, then only you can get reviews. If you are meeting your client personally, you can use an iPad, open your profile and ask them for a favor. Other than this, add a link with a badge of "Review Us on Google" on your website, newsletter, email signatures etc.
Make sure you show the necessity of these reviews and why you need them. If you are simply asking for a review, they may not take it seriously. But, if you give them a reason, like we are going to run a marketing campaign to a wider audience and we would like to increase our overall ratings before the campaign, as our competitors have better rating, it would be great if you can share your valuable feedback for the services we offered. We will really appreciate it.