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Core Web Vitals in 2026: What Actually Matters Now

Google keeps updating what matters for performance. Here's the current state of Core Web Vitals and where to focus your optimization efforts.

James Wolf

James Wolf

Founder @ SlyDuck

December 30, 2025
Core Web Vitals dashboard

The Current Core Web Vitals

As of 2026, Google's Core Web Vitals consist of three metrics:

  • LCP (Largest Contentful Paint): How fast does the main content load?
  • INP (Interaction to Next Paint): How responsive is the page to interactions?
  • CLS (Cumulative Layout Shift): Does the page jump around while loading?

Note: FID (First Input Delay) was replaced by INP in March 2024.

What "Good" Looks Like

LCP: ≤ 2.5 seconds

LCP measures when the largest content element becomes visible. Usually hero images or large text blocks.

INP: ≤ 200 milliseconds

INP measures responsiveness throughout the entire page lifecycle, not just the first interaction.

CLS: ≤ 0.1

CLS measures visual stability. Any time something moves unexpectedly, your score takes a hit.

What Actually Affects Rankings

Core Web Vitals are a ranking factor, but not a huge one. Content relevance still matters more. But Core Web Vitals become a tiebreaker when two pages are equally relevant.

Quick Wins

Improving LCP

  • Optimize your hero image (WebP, AVIF)
  • Use fetchpriority="high" on the hero image
  • Remove render-blocking resources

Improving INP

  • Break up long tasks
  • Optimize event handlers
  • Reduce JavaScript

Improving CLS

  • Set dimensions on images and videos
  • Avoid inserting content above existing content
  • Use skeleton loaders with fixed heights

The Bottom Line

Focus on: LCP (fast main content), INP (responsive interactions), CLS (stable layout).

Test with real devices. Monitor field data. Improve incrementally.

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SlyDuck's DuckSpeed feature tracks Core Web Vitals across your projects. See your performance scores and get recommendations. Monitor your performance.

Track your Core Web Vitals

SlyDuck's DuckSpeed feature monitors LCP, CLS, FCP, and performance scores across all your projects. Know when speed drops before rankings do.

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James Wolf

James Wolf

Founder @ SlyDuck

Building SlyDuck: the growth dashboard for vibe coders. Builder, leader, Dad, creator.

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