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?
In my own experience, I have found that simply asking often works wonders. Maybe not immediately, but follow up several months later. Be sure to include a link that will take them directly to the review area.
That said, the answer depends a lot on the type of business you are in and it might make sense to pay a digital marketer to help you develop and implement a customer review strategy.