The Your Sites page lists all Sites for each Team alongside their Core Web Vitals, giving you a bird's-eye view of overall performance. This page is available for each Team you are a member of, or all Teams (if you are an administrator of an organisation).
Data sources#
You can switch between three data sources using the tabs above the Sites table:
| Data source | Description | Methodology |
|---|---|---|
| Synthetic | Calibre’s lab test data collected through manual and automated tests. | Displays 75th percentile (P75) data for all Pages and Test Profiles for the last Snapshot. |
| CrUX | Real-user data from Google’s Chrome User Experience Report based on pre-defined user eligibility. CrUX is the official Web Vitals program dataset, used as a signal for Google’s search ranking algorithm. | Displays the last 28 days of 75th percentile (P75) origin data from CrUX. |
| RUM | Performance data from your own visitors, collected via Calibre’s Real User Monitoring snippet. RUM covers all browsers and provides real-time insight into how users experience your site. | Displays 75th percentile (P75) data from the selected time period. |
Available metrics#
Each data source displays a different set of Core Web Vitals:
| Data source | Loading | Visual stability | Interactivity |
|---|---|---|---|
| Synthetic | Largest Contentful Paint | Cumulative Layout Shift | Total Blocking Time |
| CrUX | Largest Contentful Paint | Cumulative Layout Shift | Interaction to Next Paint |
| RUM | Largest Contentful Paint | Cumulative Layout Shift | Interaction to Next Paint |
Metric grading#
Metrics are coloured according to their value set against recommended ranges for best performance:
- green: good
- amber: needs improvement
- red: poor
Why is a metric measurement missing?#
In some cases, you will notice a dash (—) in the column corresponding to a metric. This can happen for multiple reasons, depending on chosen data source:
- Synthetic: the most recent test did not complete successfully.
- Synthetic: there is no JavaScript assets and runtime, or there's a significant amount of repeated JavaScript activity, which causes the browser's main thread to never be at rest for the duration of the test. In this case, the Total Blocking Time and Time to Interactive measurements cannot be collected.
- CrUX: there is no data present for a given domain (or a singular metric for a domain) as it doesn't meet user eligibility criteria.
- RUM: no sessions have been recorded for the site, or Real User Monitoring has not been enabled.
Customise displayed metrics#
You can modify which metrics appear in the Sites table according to what's vital to your context. Customisation is available for each data source view — Synthetic, CrUX and RUM.
- Click the Customise button in the top right corner of the table.
- Toggle the metrics you want displayed.
- Click Save to apply your selection.
Finding a Site#
If you are managing many Sites, finding the right one should be easy. You can quickly filter the Site list by using the Filter sites search box.
Tracking a new Site#
You can add a new Site directly from Your Sites page by clicking the Track new Site button.