GuardYak Docs

How to monitor Core Web Vitals in GuardYak

A slow page loses visitors and search ranking long before it goes down. A Core Web Vitals check runs a Lighthouse test through Google PageSpeed and alerts you when the performance score or Largest Contentful Paint gets worse than your limit.

Before you start

  • A GuardYak account (every check type is available on the free plan)

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Transcript

Catch a slow page before it costs you visitors and search ranking. Here's how to monitor Core Web Vitals in GuardYak.

Start a new check and choose Core Web Vitals.

Name the check, paste the page address, and choose mobile or desktop. Then set your limits: alert when the largest content takes over two and a half seconds, or the score drops below seventy.

Select Next, then add the email address that should hear about problems.

Select Review, check the summary, and create it. The new check joins your list, and GuardYak starts checking on its next run.

Steps

  1. Choose the check type ▶ 0:09

    In Checks, select + New check, then select Core Web Vitals.

    New check page with the Core Web Vitals check type highlighted

  2. Fill in the details ▶ 0:13

    Enter a Check name and the page URL, choose the Strategy, then set Alert when LCP exceeds (ms) and Minimum performance score (0–100). Every hour is plenty for this kind of check.

    Configure step for a Core Web Vitals check with its fields filled in

  3. Choose who gets alerts ▶ 0:27

    Select Next. Under Address, enter the email that should receive alerts.

    Notify step with an email address entered for alerts

  4. Create the check ▶ 0:32

    Select Review, check the summary, then select Create check. The new check appears on Checks.

    Checks list showing the new Home page speed check
ResultThe check appears on Checks with type Core Web Vitals. It fails when either limit is crossed.

Next steps

Updated 2026-11-03