A satisfied client is not the same as a client who leaves a review. Satisfaction happens automatically when the job goes well; a review requires the client to take an extra action, at a moment they're not thinking about your business anymore. Closing that gap is almost entirely about timing and friction, not about the quality of the work.
Timing: ask at the moment of relief
The best moment to ask is right after the job is done and paid — not a week later in a batched email, when the immediate satisfaction has faded into the background of a busy week. A same-day text with a direct link outperforms a generic follow-up email by a wide margin.
Friction: make the ask a single tap
"Please leave us a review" with no link makes the client do the work of finding your business page. A direct link to the review form, sent by text, removes every step between "yes, happy to" and the review actually existing.
What to actually say
Keep it specific and short: name the job, thank them, ask directly. "Thanks for having us out for the water heater today — if you have 30 seconds, a review here helps other homeowners in [town] find us: [link]." Specific beats generic every time.