How SpeedCurve fits into a Core Web Vitals monitoring workflow
Use real-user data and controlled tests to investigate performance problems, with clear page groups and an actionable pilot.
Topics
Core Web Vitals
Guides to Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift: what they measure, how Google evaluates them and how to improve each one.
6 articles
Start with the part of the visit that is failing. LCP describes when the largest visible content appears, INP describes responsiveness to interaction, and CLS describes unexpected layout movement. Each requires a different investigation.
These guides explain the thresholds, the 75th percentile and the difference between real-user reports and controlled tests. They then connect the result to a specific element, interaction or layout change.
Choose the beginner guide if the reports are unfamiliar. Use the individual metric guides when you already know which value needs work. Keep device category, collection period and URL or origin scope attached to your measurements so a change can be evaluated on the same basis.
Field data vs lab data: why PageSpeed Insights results differ
Two results can disagree without either being wrong. Check the population, time window and measurement before choosing a fix.
How to fix Cumulative Layout Shift: stabilize images, ads, embeds and fonts
The paragraph that moves is often only the symptom; the missing space above it is the cause.
How to improve Interaction to Next Paint: diagnose input, processing and rendering delays
A quick event handler is not enough if another task prevents it from starting or the browser cannot paint its result.
How to improve Largest Contentful Paint by fixing the slowest LCP stage
The largest image is not always the problem; the delay before it starts loading can matter more.
Core Web Vitals for beginners: measure and improve LCP, INP and CLS
Start with the experience your visitors have, then use the right measurement to decide what to fix.