WordPress Core Web Vitals: Proven Fixes to Avoid Slow Pages
Most WordPress sites fail at least one Core Web Vital, and most optimisation attempts make things worse because they start with a plugin instead of a diagnosis. This guide sets out what LCP, INP and CLS actually measure, why the WordPress stack fails them in predictable ways, how to tell field data from lab data before wasting a quarter on the wrong metric, a one-hour diagnostic path, the repair order for each metric, realistic UK costs from a £600 hosting upgrade to a £9,500 rebuild, a 90-day roadmap built around the 28-day field data window, and the mistakes that leave sites slower than they started.
