Catch the slow pages costing you sales
Real-user Core Web Vitals — LCP, INP, CLS — from actual visitors.
Speed is conversion. CRO9 measures Core Web Vitals from real visitors — Largest Contentful Paint, Interaction to Next Paint, Cumulative Layout Shift, and more — so you catch the slow, janky pages that quietly lose buyers before they ever see your offer.
What does CRO9 track for performance & web vitals?
LCP
Largest Contentful Paint — how fast the main content appears.
INP
Interaction to Next Paint — how responsive the page feels.
CLS
Cumulative Layout Shift — how much the page jumps around.
TTFB & FCP
Server response and first paint timing per page.
| Performance & Web Vitals signal | Basic analytics | CRO9 |
|---|---|---|
| LCP | Not captured | Automatic |
| INP | Not captured | Automatic |
| CLS | Not captured | Automatic |
| TTFB & FCP | Not captured | Automatic |
Why does performance & web vitals matter for conversions?
- A slow LCP on your landing page can cut conversions before the fold even loads.
- Real-user vitals catch problems lab tests miss on real devices and networks.
- Google uses Core Web Vitals for ranking — fixing them lifts SEO and sales.
How does CRO9 turn performance & web vitals into sales?
Measure
Vitals are captured from every real visitor, per page and device.
Rank
The dashboard flags pages with poor LCP, INP, or CLS.
Prioritize
CRO9 lists the slowest high-traffic pages so you fix what matters.
<script src="https://www.cro9.com/cro9-tracker.js" data-api-key="YOUR_KEY"></script>Paste it once. Performance & Web Vitals tracking — and all nine categories — turn on instantly.
Frequently asked
Is this the same as PageSpeed?
PageSpeed is a lab test on one machine; CRO9 captures real-user vitals from your actual visitors across real devices and networks.
Which metrics do you track?
LCP, INP, CLS, TTFB, and FCP — the full Core Web Vitals set that affects both conversions and SEO.
Does poor performance hurt rankings?
Yes. Core Web Vitals are a Google ranking signal, so fixing them helps SEO as well as conversion.
Explore the tracking model
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Sources & further reading
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