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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteGoogle’s current Core Web Vitals are LCP, INP, and CLS. A page is in the “good” range for each when its 75th-percentile field results are LCP at or below 2.5 seconds, INP at or below 200 milliseconds, and CLS at or below 0.1. Google uses Core Web Vitals in its ranking systems, but passing them does not guarantee a high Search position.
What are the current Core Web Vitals thresholds?
The metrics cover loading performance, responsiveness, and visual stability. Google presents the thresholds below as guidance for a good user experience; PageSpeed Insights also labels results that fall outside the good range as “needs improvement” or “poor.”
| Metric | What it measures | Good | Needs improvement | Poor |
|---|---|---|---|---|
| Largest Contentful Paint (LCP) | Loading performance | ≤ 2.5 seconds | > 2.5 to ≤ 4 seconds | > 4 seconds |
| Interaction to Next Paint (INP) | Responsiveness | ≤ 200 milliseconds | > 200 to ≤ 500 milliseconds | > 500 milliseconds |
| Cumulative Layout Shift (CLS) | Visual stability | ≤ 0.1 | > 0.1 to ≤ 0.25 | > 0.25 |
These are the documented bands, including their boundary values. Google’s Core Web Vitals documentation explains the metrics and good thresholds; PageSpeed Insights documentation describes the report’s performance categories.
INP replaced FID
INP is the current responsiveness metric; First Input Delay (FID) is no longer a Core Web Vital. Google made the change effective March 12, 2024. Older articles may give an FID threshold, but it is not the current Core Web Vitals guidance. Google’s INP announcement documents the transition and effective date.
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What do field data and lab data mean?
They answer different questions. Field data describes what real visitors experienced, while lab data is a controlled, automated test that helps diagnose potential problems. A lab result is not a substitute for the field experience, and results may differ because the test environment and actual users’ devices, networks, and interactions differ.
| Evidence | What it represents | Best use |
|---|---|---|
| Field data (CrUX) | Measurements from real Chrome users, summarized over a trailing 28-day period | Understand observed user experience |
| Lab data (Lighthouse) | An automated diagnostic run under a simulated test environment | Investigate possible causes and test changes |
PageSpeed Insights combines Chrome UX Report (CrUX) field data with Lighthouse lab diagnostics. Its field data is updated daily and summarizes a trailing 28-day period; the CrUX BigQuery dataset is updated monthly and also represents a trailing 28-day period. BigQuery data is origin-level. PSI reports field results at the 75th percentile, a summary that gives weight to less favorable experiences rather than showing only an average. These reporting details are documented by Google PageSpeed Insights.
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Why does PageSpeed Insights say there is no data?
No field result does not mean a page failed Core Web Vitals. A page may not have enough eligible Chrome-user samples for a URL-level CrUX result. In that case, PSI may show data for the broader origin instead. If the origin also lacks sufficient data, PSI cannot show a real-user field result.
- URL data available: Review the field metrics for the specific page.
- URL data insufficient, origin data available: PSI may show origin-level results, which describe the site origin rather than that individual URL.
- Neither level has sufficient data: There is no CrUX field result to assess; use Lighthouse diagnostics for a lab test, but do not treat it as real-user field data.
Google’s documented Core Web Vitals assessment requires good 75th-percentile LCP, INP, and CLS when all three have sufficient data. If INP data is insufficient, the assessment can pass when both LCP and CLS are good. If LCP or CLS data is insufficient, Google’s documented assessment cannot be made. This is distinct from a poor score: missing evidence is not itself evidence of poor performance. See PageSpeed Insights’ data-sufficiency guidance.
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Are Core Web Vitals a Google ranking factor?
Google says Core Web Vitals are used by its ranking systems, but they are not a standalone switch or a promise of a ranking increase. Google describes page experience as a variety of signals rather than one single signal. It also cautions that good results in Search Console or third-party reports do not guarantee top positions: relevance and other factors remain important. Its systems may still show the most relevant content when page experience is subpar, while strong page experience can contribute when many helpful results are available.
Google’s guidance is concise: “There is no single signal.” Read Google’s page-experience guidance for its explanation of ranking context and the limits of report scores, and the Core Web Vitals documentation for the metrics themselves. Google does not publish a fixed weighting or guarantee a specific ranking lift for passing.
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How should you check and improve a site?
- Monitor groups of pages: Open the Core Web Vitals report in Google Search Console to see which page groups need attention.
- Inspect an individual URL: Enter it in PageSpeed Insights. Check whether the field section shows URL data, origin-level data, or no data, then review available LCP, INP, and CLS results.
- Diagnose suspected issues: Use the Lighthouse lab diagnostics in PageSpeed Insights to investigate potential causes and evaluate changes. Treat this as a controlled test, not a replacement for field evidence.
- Separate device segments: Review mobile and desktop performance separately; aggregate results can conceal differences between visitor experiences.
Google identifies Search Console, PageSpeed Insights, and Lighthouse as tools for monitoring and diagnosing performance. Its measurement resources are linked from the Core Web Vitals documentation and PageSpeed Insights documentation. A passing metric report is useful evidence about user experience, not a ranking forecast.
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