Do you guarantee Lighthouse scores?

Yes, Lighthouse 90+ on mobile and desktop on the agreed key pages (homepage, top category, top PDP, checkout step 1) at go-live. It’s in the contract. If we miss it, we keep tuning at no extra charge until we hit it. The audit-only tier doesn’t carry the guarantee, it’s a diagnostic report. The Express Audit + Full Optimization combo does. The Lighthouse target is measured on the staging environment with the production traffic profile (no GTM blocking, no ad-blockers, throttled to Lighthouse’s mobile network), the same way Google measures it. We won’t cheat the score by removing necessary scripts, we’ll defer / tree-shake / replace them with lighter alternatives.