Glossary

Core Web Vitals

Google's set of speed and stability metrics — LCP, INP, CLS — used as ranking signals.

Core Web Vitals are Google's standardized metrics measuring real-world page experience: Largest Contentful Paint (LCP — when the main content renders), Interaction to Next Paint (INP — responsiveness, replaced FID in 2024), and Cumulative Layout Shift (CLS — visual stability). Google uses Core Web Vitals as direct ranking signals; pages failing thresholds are deprioritized. Targets: LCP < 2.5s, INP < 200ms, CLS < 0.1. Empire325 engineers websites for top-decile Core Web Vitals through Next.js architecture, image optimization, code splitting, font loading strategy, and ongoing Lighthouse monitoring.

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Enterprise-grade Next.js, React, and headless commerce builds engineered for conversion and Core Web Vitals.

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