Core Web Vitals ,

Google's three real-world performance metrics measure how fast your pages load, how quickly they respond and how stable they are while loading. They're a direct ranking signal , and a direct measure of whether visitors stay or leave.

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Google Ranking Signal LCP · INP · CLS Real-World Performance 100% Australian
Core Web Vitals , Field Data All Good
LCP Largest Contentful Paint
1.8s / 2.5s
Time for the largest visible element to render.
INP Interaction to Next Paint
140ms / 200ms
How fast the page responds to a click or tap.
CLS Cumulative Layout Shift
0.03 / 0.1
How much elements move unexpectedly during load.

How Google measures whether your site feels fast.

Core Web Vitals aren't lab scores , they're measured on real users' devices in real conditions. That's what makes them matter: Google is measuring the experience your actual visitors have, not a synthetic benchmark.

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THE SIGNAL

A direct ranking factor since 2021.

Google made Core Web Vitals an official ranking signal with the Page Experience update. Pages that score "Good" across all three metrics get a boost , and pages that score poorly are actively disadvantaged. It's one of the few performance signals Google has publicly confirmed affects rankings.

THE BUSINESS CASE

Better scores mean more sales, not just better rankings.

Google's own research found that sites meeting Core Web Vitals thresholds see 24% fewer abandonments. Faster loads, stable layouts and responsive interactions reduce the friction that loses customers , so improving your scores lifts conversions alongside rankings. The two goals are the same work.

THE THREE METRICS

LCP. INP. CLS.

Each metric measures a different dimension of page experience. Google publishes the exact thresholds , real numbers, not estimates , and you need to score Good on all three.

LCP

Largest Contentful Paint

Loading speed

How long it takes for the largest visible element , usually a hero image or heading , to render on screen.

Good: <2.5s OK: 2.5–4s Poor: >4s

Common causes: large unoptimised images, render-blocking resources, slow server response.

INP

Interaction to Next Paint

Responsiveness

How quickly the page reacts when a user clicks, taps or types , from the interaction to the next visual response.

Good: <200ms OK: 200–500ms Poor: >500ms

Common causes: heavy JavaScript blocking the main thread, large event handlers, excessive DOM size.

CLS

Cumulative Layout Shift

Visual stability

How much page elements move around unexpectedly while loading , the annoyance of a button jumping just as you tap it.

Good: <0.1 OK: 0.1–0.25 Poor: >0.25

Common causes: images without size attributes, late-loading ads, dynamically injected content.

How to improve your scores.

Each metric has well-understood causes and fixes. Most real improvements require code-level changes rather than plugin settings , which is where most DIY attempts stall.

01
Optimise & size images correctly

Large images are the most common cause of poor LCP. Serving next-gen formats (WebP/AVIF), setting correct dimensions and lazy-loading below-fold images resolves most LCP issues.

02
Eliminate render-blocking resources

CSS and JavaScript that blocks rendering delays LCP. Deferring non-critical JS, inlining critical CSS and removing unused code reduces this significantly.

03
Reduce main-thread work

Heavy JavaScript execution blocks the browser from responding to input, causing poor INP. Code splitting, deferred loading and removing unused third-party scripts are the main fixes.

04
Reserve space for every element

Images, ads and embeds without declared dimensions cause layout shifts. Setting explicit width and height on every media element and using CSS aspect-ratio eliminates most CLS.

05
Improve server response & use a CDN

Slow Time to First Byte delays every other metric. Server optimisation, edge caching and CDN configuration get the first byte to the browser as fast as possible.

REAL RESULTS

See It In Action.

See how our design, development, SEO and GEO work has delivered measurable results across real client projects.

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Search Impressions

More than 2.89 million impressions generated across Google Search.

16
Months of SEO

Consistent optimisation delivering sustained, long-term organic growth.

What Our Clients Say.

Don't take our word for it , here's what the businesses we've worked with have to say.

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Marketing, Dolphy
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COMMON QUESTIONS

Core Web Vitals FAQs.

Do Core Web Vitals actually affect Google rankings?

Yes , Google confirmed Core Web Vitals as an official ranking signal in 2021 with the Page Experience update. They act as a tiebreaker rather than a primary signal: strong content and authority still outweigh performance, but in competitive niches where pages are closely matched, Vitals scores can be the deciding factor.

Where do I check my Core Web Vitals scores?

The most accurate source is the Core Web Vitals report inside Google Search Console, which uses real-user field data collected from Chrome. PageSpeed Insights shows both field data and lab data. The field data is what Google uses for rankings , lab scores from Lighthouse are useful for debugging but don't directly influence ranking.

What's the difference between LCP, INP and CLS?

They measure three different dimensions. LCP measures loading speed , how fast the main content appears. INP measures responsiveness , how quickly the page reacts when you click or tap. CLS measures visual stability , whether elements jump around while loading. You need to score Good on all three.

My Lighthouse score is 90+ but Search Console shows Poor. Why?

Very common. Lighthouse runs in a controlled lab on a simulated device , it doesn't reflect what real users experience on their phones and connections. Search Console captures real users, including those on slow connections and older Android devices. The field data is what matters for rankings, which is why optimising against real-user data is essential.

How long does it take to improve Core Web Vitals?

Technical improvements can be implemented quickly, but Search Console field data updates on a 28-day rolling window , so you won't see the change reflected immediately. Expect the field data to shift within four to six weeks of the changes going live.

Can you improve Core Web Vitals on Shopify or WordPress?

Yes, though the degree varies by platform. Shopify has some architectural constraints but significant gains are still achievable through theme optimisation, image handling, app auditing and CDN configuration. WordPress gives more control and typically allows more dramatic improvements. We've worked on both extensively.