Definition
A discipline focused on making sure customers actually achieve the outcome they bought, not just that they were sold and set up. It began in software but applies to any service business where renewals, repeat visits, or long contracts depend on the customer being able to see the value they are paying for.
What it looks like in practice
Quarterly pest control is a year-two business; the money sits in renewals, not the first treatment. So the customer success habit here is simple and ongoing: after every visit the technician logs what he found, and the office reviews any account showing activity on two consecutive reports. Those customers get a call from a person, not a survey: what are you still seeing, and where. A crawlspace issue that would have surfaced as a cancellation in month nine instead becomes an extra visit in month four. The test is not whether the customer sounded happy on the phone but whether the ants are gone.
Why it matters
For an owner whose revenue depends on renewals and repeat visits, customer success is the standing practice of checking that people are getting the result they paid for, while there is still time to fix it. Done proactively it turns a one-time buyer into a loyal one and a reliable source of referrals. The cost is real, though: it takes deliberate effort and usually a named point of contact, which is why most small businesses end up doing it reactively, only once someone complains. Onboarding gets the customer started; customer success is what keeps the promise true for the next two years.