Core Web Vitals Action Planner

Classify Core Web Vitals symptoms, template reach, and business importance to create a focused performance investigation plan.

/web & seo

Fix the template, not one screenshot

Turn LCP, INP, and CLS symptoms into an ordered investigation.

Largest Contentful Paint

Use mobile field data when available.

Good: ≤2.5sNeeds improvement: 2.5–4sPoor: over 4s

Interaction to Next Paint

Slow interaction often points to long JavaScript tasks.

Good: ≤200msNeeds improvement: 200–500msPoor: over 500ms

Cumulative Layout Shift

Unexpected movement usually comes from unreserved media or injected UI.

Good: ≤0.1Needs improvement: 0.1–0.25Poor: over 0.25

How broad is the issue?

A shared template problem should be fixed once and validated across its URL group.

One low-value pageOne important templateSeveral revenue or lead templates

performance priority4/12

Keep monitoring field data and prevent regressions in templates and third-party scripts.

Group affected URLs by template and business value.
Measure field and lab data on representative mobile pages.
Audit hero media, layout reservations, JavaScript tasks, fonts, and third parties.
Compare field metrics and conversion events after release.

Planning guidance, not a quote, guarantee, legal opinion, or substitute for inspecting the real system.