The arithmetic is unforgiving and worth understanding before you spend effort in the wrong place: bad reviews almost never come down, so a rating improves by dilution. A business sitting at 4.2 with 40 reviews needs roughly 25 new five-star reviews to reach 4.5. At two a month that is a year; at ten a month it is under a quarter.
That single calculation tells you where the leverage is. It is not in disputing the review you think is unfair. It is in the request workflow.
What actually moves the number
Ask every customer, every time, immediately. The request that goes out within an hour or two of the work being finished converts dramatically better than one sent the following week. Most businesses lose here — not because customers are unwilling, but because nobody asked while it was fresh.
Ask by text. Email requests for local service work get buried. A text with a direct link to the review form removes every step between intent and action.
Make it one tap. Link to the review form itself, not to your profile or your website. Every additional click loses people.
Do not filter. Beyond being against the rules, filtering suppresses the volume that fixes the average.
What to expect
A steady rate matters more than a burst. Twenty reviews arriving in one week after two silent years looks manufactured to both Google and to humans reading the dates. Consistency is the signal.
Also worth resetting expectations on the target: 4.9 is not the goal. Ratings between 4.5 and 4.8 with meaningful volume convert better than a perfect 5.0 on twelve reviews, which reads as either new or curated. A handful of mediocre reviews among many good ones is evidence the profile is real.
If the rating is genuinely low because the service had problems, no request workflow fixes that — the reviews are doing their job. Fix the operational issue first, then start asking.
The full review acquisition guide covers the request templates, timing, and the tooling worth paying for.