Glossary

CLS (Cumulative Layout Shift)

A Core Web Vital metric measuring visual stability by quantifying unexpected layout shifts. Good CLS is under 0.1.

What is CLS (Cumulative Layout Shift)?

Cumulative Layout Shift (CLS) measures the sum of all individual layout shift scores for every unexpected layout shift that occurs during the entire lifespan of a page.

Performance Thresholds

  • Good: < 0.1
  • Needs Improvement: 0.1 - 0.25
  • Poor: > 0.25

Key Takeaways

  • 1.CLS (Cumulative Layout Shift) is important for website performance and SEO.
  • 2.You can measure it using tools like BulkAudit and Google Lighthouse.
  • 3.Improving this metric can lead to better user experience and search rankings.

Learn More

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