Search Engine Optimization

Mastering Core Web Vitals for Top Rankings

Quiz Crest
August 1, 2025
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Test how well you apply mastering core web vitals for top rankings in real projects. Each question reflects current Google guidance and accepted practice.

Which three metrics make up Core Web Vitals for Search evaluation?

LCP, INP, and CLS

LCP, FID, and CLS

TTFB, FID, and FCP

TTFB, FCP, and CLS

Core Web Vitals consist of Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift. These are assessed using field data from real users.

At what percentile are Core Web Vitals thresholds evaluated for a page to be considered ‘good’?

50th percentile

75th percentile

90th percentile

Origin median only

Evaluation is based on the 75th percentile of page loads. This applies across mobile and desktop segments.

What is the ‘good’ threshold for INP in 2025?

≤ 200 ms

≤ 1 s

≤ 100 ms

≤ 500 ms

A good INP score is 200 milliseconds or less. Values above 500 ms are poor; between 200–500 ms needs improvement.

What is the recommended ‘good’ threshold for LCP?

≤ 4.0 s

≤ 1.5 s

≤ 2.5 s

≤ 3.5 s

Google recommends LCP within 2.5 seconds. Meeting this for at least 75% of visits is considered good.

What ‘good’ threshold is used for CLS?

≤ 0.25

≤ 0.15

≤ 0.1

≤ 0.2

Cumulative Layout Shift of 0.1 or less is good. Visual stability is assessed on field data.

Which dataset provides field (real‑user) data commonly used in CWV assessments?

WebPageTest synthetic

HTTP Archive lab dataset

Local Lighthouse desktop only

Chrome User Experience Report (CrUX)

CrUX aggregates anonymized real‑user performance data. Tools such as Search Console derive CWV status from field data.

Which upstream dependency most directly impacts LCP when server responses are slow?

DNS lookup only

Time to First Byte (TTFB)

CLS from ad slots

Viewport height

Slow server responses delay HTML and render paths, worsening LCP. Optimizations include caching, CDNs, and backend improvements.

Which statement best reflects Google’s stance on CWV and rankings?

CWV guarantees #1 rankings

Only CLS affects rankings

CWV is ignored by ranking systems

Good CWV aligns with what core ranking systems aim to reward but doesn’t guarantee top positions

Page experience, including CWV, aligns with what core ranking systems reward. However, it does not ensure a specific ranking.

For a page to pass the CWV assessment, what must be true for all three metrics?

Overall average is ‘good’

Any one metric can be poor

Origin median replaces URL data in all cases

They meet ‘good’ thresholds at the 75th percentile

Assessment requires each metric to reach its good threshold at the 75th percentile. Aggregations can be at URL or origin level depending on data volume.

Where can you see groups of URLs labeled Good / Needs improvement / Poor based on field CWV data?

Lighthouse CI only

Core Web Vitals report in Search Console

Chrome DevTools Performance tab

PageSpeed Insights lab report

Search Console groups similar URLs and labels status by metric. The report uses CrUX field data distributions.

Starter

Good start. Review the fundamentals of Mastering Core Web Vitals for Top Rankings and retest after fixes.

Solid

Nice work. Tighten weak spots and align with current guidance for consistent wins.

Expert!

Outstanding mastery of Mastering Core Web Vitals for Top Rankings. Keep shipping playbooks and share benchmarks.

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