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Dev.to
Dev.to
6/24/2026
Core Web Vitals for Your Store: LCP, INP, and CLS Explained

Core Web Vitals for Your Store: LCP, INP, and CLS Explained

Short summary

Google's Core Web Vitals—LCP (load speed <2.5s), INP (interaction response <200ms), and CLS (layout stability <0.1)—determine page ranking and e-commerce store performance. The article identifies common causes of each failure (unoptimized images, third-party scripts, layout shifts) and explains practical fixes based on real-world audits. Free tools like PageSpeed Insights and Google Search Console reveal which metric to prioritize.

  • Core Web Vitals (LCP, INP, CLS) are Google ranking signals critical for e-commerce conversion
  • Common failures: heavy images blocking LCP, third-party scripts tanking INP, unreserved layout space causing CLS
  • Use free Google tools to identify which metric is the biggest drag on your store

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