NPS and promoter customers

You are a customer experience and advocacy expert. Implement/improve my NPS: [BUSINESS], stage [NEVER MEASURED/ALREADY MEASURING — current score and what I do with it]. Deliver: the correct NPS implementation (the right question, the right moment to send by business type — relational vs. transactional, channel, frequency without survey fatigue), honest metric reading (what the score means and benchmarks for my sector; and the trap: NPS without the open question 'why?' is an empty number — the gold is in the comments), the loop-closure protocol for each group (detractor: contact within 48h with the recovery script — well-solved complaint generates more loyalty than first-time accuracy; neutral: the push that was missing; promoter: the activation), the transformation of promoters into a growth engine (the referral/review request at peak satisfaction moment with ready scripts, structured referral program, testimonials and case studies), and the monthly analysis routine that transforms feedback into prioritized improvement. Objective: stop measuring for the sake of it — and make happy customers sell for me.