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Glossary

Core Web Vitals

Google’s core page-experience metrics: how fast primary content appears, how responsive the page feels, and how stable the layout is.

What does it mean?

Core Web Vitals are three field metrics: LCP (Largest Contentful Paint), INP (Interaction to Next Paint), and CLS (Cumulative Layout Shift). They describe real-user experience — not only a Lighthouse lab score.

They are one ranking factor among many. Faster pages often crawl and convert better — but vitals do not replace good content and technical SEO discipline.

When you should take them seriously

  • Organic traffic matters

    When Google and landing pages drive the business.

  • Heavy themes and plugins

    Often WordPress or page builders that hurt LCP.

  • Ecommerce and lead forms

    Slow interaction and layout shift cost clicks.

  • You are changing stack

    Migrating to Next.js is a chance to bake vitals in from day one.

Short answers

  • Is a green Lighthouse score enough?

    No. Lab scores help diagnosis; field data (CrUX/Search Console) is what Google weighs.

  • Does Next.js fix it automatically?

    It gives you better tools — you still choose images, fonts, and third-party scripts carefully.

  • What is the typical first win?

    Images, font loading, and removing heavy JS above the fold — before you rebuild the whole CMS.

Are your vitals in the red?

Let’s find the simplest path to a faster page.

Sometimes it is caching and images. Sometimes it is the stack. We start with the measurement.