Happy customers go back to their Saturday. The angry one writes four paragraphs. Six months later you find out, after it already cost you the people who did find you.
The fix is not a poster at the register. Most of this work happens in a house, not a showroom. A text after the job — while they still remember the name on the van — is the whole system. Listings have to match the towns you actually serve. Someone has to see a one-star before it sits unanswered.
I run this on the company my dad built. The receptionist can send the ask when the job is marked complete in Housecall Pro. You can run the tool yourself at $149 a month, or I can watch it at $499.