
Core Web Vitals is the most important indicator of the quality of the user experience that affects SEO and ranking in Google. However, many website owners face a problem: data does not appear in Google Search Console, and the reasons for this are not always obvious.
Sergey Kozlov
Factors affecting the appearance of Core Web Vitals metrics in Search Console. The Google Search Console report on Core Web Vitals is generated only on the basis of field data of real users (Chrome User Experience Report, CrUX). In order for metrics to appear, it is necessary to accumulate sufficient amount of such data. Google groups data for last ~28 days and calculates indicators based on the 75th percentile.
At the same time, a certain minimum data threshold is required (Google does not disclose a specific amount). The following conditions are important: the site must have enough visitors (get into the CrUX sample) and be publicly available and indexed in the search. In addition, data is collected separately for different types of devices, so for each type (mobile/desktop) you need your own sufficient traffic sample. It is also taken into account that Chrome users must not disable the transmission of statistics otherwise their visits will not get into CrUX. Thus, the key factors are volume and quality of real traffic to the site (especially from Chrome users) and compliance with CrUX data collection conditions.
Reasons for the lack of Core Web Vitals data. In practice, the report may show no Data in two main cases: new site (new resource in Search Console) or lack of field data for calculating metrics. Often the problem is related to the fact that the site too little traffic.
If Chrome has not accumulated enough speed statistics for your URLs, Search Console will display a warning like: Chrome User Experience Report does not contain sufficient speed data for this page.
In other words, the site has not gained a critical mass of visits on the desktop and/or mobile devices necessary for inclusion in the report. Especially vulnerable new and little-visited sites they have the least chance of getting into the CrUX database quickly. Moreover, even if there seem to be a lot of visitors, data may not be collected: for example, if users do not generate telemetry (disable chrome synchronization or statistics collection), Google will still not have the necessary information. Google also takes into account the quality of data: if there is little information or it is too noisy, the system may decide not to show metrics at all in order not to mislead. Also, the lack of data may be observed only for one category of devices, for example, the desktop report is empty if the desktop has not collected data for 28 days, even if the mobile traffic is sufficient. All these factors can lead to the fact that the Core Web Vitals section in GSC temporarily (or even permanently for a very small site) does not display statistics.
How to speed up the appearance of indicators. Since Core Web Vitals data in Search Console depends on real users, the only way to accelerate their appearance is to ensure that this data arrives faster. In practice, this means attracting more real visitors to the site (especially through Chrome) and giving the system time to accumulate statistics. Google directly indicates that more traffic increases the chance of metrics appearing soon, although it does not give a guarantee.
Make sure that the site is open for indexing and meets the requirements of CrUX (not closed from scanning, works over HTTPS, etc.) so that Google can include it in data collection. If the site had performance problems, fix them even though this will not directly add data, you will ensure that new visitors get a good experience, and the metrics will immediately be in the green zone when they appear. It is important to understand that it is impossible to manually download or send these indicators to Google, it remains only to increase attendance and wait. The report is updated as the data accumulates, and usually the full update cycle takes up to 28 days. Therefore, even after increasing traffic and improving speed, you need to wait patiently for some time until Search Console starts showing information.
As the Google specialist Martin Splitt
If you have already fixed everything and the test tools show good results, no need to panic, you did everything you could, it remains to let the system collect data.
At this time, you can use laboratory tools (PageSpeed Insights, Lighthouse) to monitor progress, but field metrics will appear in GSC only when Google accumulates enough information.
To display Core Web Vitals in the Google console, you need sufficient statistics of real users for recent times. The appearance of data is affected by traffic volume, Chrome user behavior (consent to send data) and public availability of the site. If the data is not displayed - most likely, the site is too new or little visited, or not enough time has passed to accumulate statistics. It is fundamentally impossible to accelerate the appearance of indicators – it is necessary to ensure the influx of real users and wait for the completion of the data collection cycle. In other words, it is important for site owners to focus on improving the speed and user experience, attract the audience and let the system collect data. As soon as the site crosses the threshold of popularity in CrUX and passes several weeks of information collection, Google Search Console will start showing Core Web Vitals metrics that reflect the real user experience.