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Page Speed

Table of Contents

What is page speed?

Page speed measures how quickly the visible content of a web page loads and becomes interactive for users, directly influencing UX, SEO rankings, and conversion rates.

Key points

  • Metrics: Largest Contentful Paint (LCP), First Input Delay (FID), Cumulative Layout Shift (CLS).
  • Benchmarks: Google recommends LCP < 2.5 s, CLS < 0.1.
  • SEO impact: Confirmed ranking factor for mobile (since 2021) and Core Web Vitals.
  • Conversions: Every 1‑second delay can cut mobile conversions by 20 % (Akamai 2025).
  • Optimisation: Image compression, lazy load, CDN, code minification.

Pro tips

  • Audit with PageSpeed Insights monthly.
  • Serve WebP/AVIF images for 30 % savings.
  • Defer non‑critical JavaScript to expedite first paint.

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