PageSpeed Insights in SEO Perception

On a page’s detail view, the PageSpeed section shows mobile lab performance data from Google’s public PageSpeed Insights API: a performance score (0–100), a few key metrics (such as LCP, CLS, and total blocking time), and short suggestions when the API returns them.

What you trigger

When you choose run a PageSpeed check, we send your page URL to Google’s API and store the returned summary in your workspace. That is how lab data is produced—there is no separate “silent” measurement of your whole site; checks are explicit and subject to cooldowns and daily limits that depend on your plan.

Possibilities

Strong scores and top suggestions can surface as possibilities (for example score thresholds or opportunity hints) so they appear alongside other page-level findings. Regular crawls do not wipe PageSpeed-only items unless a new PageSpeed evaluation has run for that context—see How we find possibilities for the overall model.

Overlay

If you use the Site overlay, we may show a read-only summary of the latest stored result for the current URL—no API keys or secrets are exposed in the browser.

Retention

Scan history is kept for a limited time (on the order of weeks) and older rows are purged as part of routine cleanup. The exact window aligns with your product’s data retention settings.

Google, PageSpeed, and PageSpeed Insights are trademarks of Google LLC. SEO Perception is not endorsed by Google; we use the public API because it is a practical lab signal for site owners.