An opportunity for performance improvement may be discovered through proactive exploration and reporting or through customer feedback or internal reports of an issue on the site. In both cases, teams will want to explore the problem or opportunity in more depth before opening a ticket with their development teams. How to investigate each Core Web Vital in more detail is outlined below.
Investigating Loading Speed (LCP) degradation in more detail
If a page or its content is loading slowly, it may indicate a degradation in LCP. Exploring the LCP tab in detail can help create a better understanding of the problem.
When did the problem start?
Explore different time period filters to determine if the performance score has been consistently low, or if it has recently degraded.
What page(s) and devices are affected?
Explore different page group and device filters to determine if performance is low for all users on all pages, or specific users on specific groups of pages.
Does the change in performance correlate to a recent release?
If release monitoring is configured for your domain, review the performance chart to see if any recent release events preceded a change to performance.
Are there LCP Opportunities for improvement?
Review any Top Opportunities (if available) and revenue loss estimates to discover the potential impact of optimizing loading speed on your site, and which page groups that carry the highest opportunity for optimization.
Click into any of your Top Opportunities to investigate where and how loading speed can be improved, backed by revenue impact estimates to help you prioritize these improvements.
Did specific pages recently drop in performance?
If the affected page or pages are part of a page group, further details may be available through the Page Group Loading Speeds section. Click on any page group for a breakdown of the processes that make up your loading speed.
Alternatively, review the Performance drop tab of the Pages Loading Speed table to identify individual pages that have degraded in performance over the period of time selected. Hover over the score to see how it has changed.
After investigating areas for loading speed (LCP) improvement in detail, it’s time to prioritize these improvements. You can share relevant details with the person responsible for making prioritization decisions via the ‘Share’ icon on the LCP page, or from the loading speed details page.
Learn more about how to prioritize LCP degradations.
Investigating Interactivity (INP) degradation in more detail
If a page element is slow to respond on a page (e.g. a delay happens after a user clicks), it can indicate a degradation in INP. The following guidelines can help create a better understanding of the problem.
When did the problem start?
Explore different time period filters to determine if the performance score has been consistently low, or if it has recently degraded.
What page(s) and devices are affected?
Explore different page group and device filters to determine if performance is low for all users on all pages, or specific users on specific groups of pages.
Does the change in performance correlate to a recent release?
If release monitoring is configured for your domain, review the performance chart to see if any recent release events preceded a change to performance.
Are specific slow interactions contributing to poor INP?
Review the Slowest Interactions by Occurrences section to identify the worst performing interactions for the page group, device group, and time period selected. Click on any item in the table for more detail about the element and how it impacts INP.
The detailed panel that pops up provides more information about the interaction, the frequency of interactions with the element, and more. Review the associated Session Highlights to see how this slow interaction impacted users on your website.
Did specific pages recently drop in performance?
Review the Performance drop tab of the Pages Loading Speed table to identify individual pages that have degraded in performance over the period of time selected. Hover over the score to see how it has changed.
After investigating areas for interactivity (INP) improvement in detail, it’s time to prioritize these improvements. You can share relevant details with the person responsible for making prioritization decisions via the ‘Share’ icon on the LCP page, or from the details of an specific slow interaction
Learn more about how to prioritize INP degradations.
Investigating Visual Stability (CLS) degradation in more detail
If a page layout shifts unexpectedly, it can indicate a problem with CLS. The following guidelines can help create a better understanding of the problem.
When did the problem start?
Explore different time period filters to determine if the performance score has been consistently low, or if it has recently degraded.
What page(s) and devices are affected?
Explore different page group and device filters to determine if performance is low for all users on all pages, or specific users on specific groups of pages.
Does the change in performance correlate to a recent release?
If release monitoring is configured for your domain, review the performance chart to see if any recent release events preceded a change to performance.
Did specific pages recently drop in performance?
Review the Performance drop tab of the Pages Loading Speed table to identify individual pages that have degraded in performance over the period of time selected. Hover over the score to see how it has changed.
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