Core Web Vitals: why does this matter for public-sector websites?
Core Web Vitals are the main website performance indicators that help assess how quickly, steadily and conveniently a page works for the user. Although these metrics are often discussed in an SEO context, for public-sector organisations they matter first and foremost because of residents’ experience: a person needs to find information quickly, fill in a form without disruption, register for a service or read an important notice on a phone.
On websites of municipalities, schools, libraries, museums and other public bodies, visitors often look for very specific information – opening hours, contact details, registration forms, documents or news. If a page loads slowly, “jumps” or does not respond to clicks, this directly worsens service accessibility. That is why Core Web Vitals are not just a technical indicator, but part of digital service quality.
The three main Core Web Vitals metrics
- LCP (Largest Contentful Paint) shows how long it takes for the main content of a page to appear on screen, for example a heading, a large image or the most important text block. If the homepage of a municipality website or a service description appears too slowly, the visitor may think the website is not working and leave before receiving the information.
- INP (Interaction to Next Paint) assesses how quickly the website responds to user actions, such as clicking a button, opening a menu or using form fields. This is especially important where residents complete applications, register for an appointment or search for information on mobile devices. In the past, FID was often used, but today practice increasingly focuses on INP.
- CLS (Cumulative Layout Shift) measures visual stability, in other words whether page elements unexpectedly move while the page is loading. If a person tries to click a link to a document, and at that moment an advert banner, image or notice loads and the content shifts, this causes inconvenience and can lead to errors.
How is this related to accessibility and user experience?
Public-sector websites must be not only informative, but also accessible to all users, including people with disabilities, older visitors or those using slower internet. A slow or unstable website becomes an additional barrier, especially when information is needed urgently – for example, about school admissions, social support, cultural events or library services.
A good Core Web Vitals result contributes to a clearer and more reliable user experience. It also helps meet general digital accessibility principles: content should be easy to access, predictable and convenient to use on different devices. Although these metrics do not directly replace accessibility requirements, they make a strong contribution to the overall quality of a website.
Why is this relevant for the public sector in the EU?
Public-sector organisations in the EU often serve a very broad audience – from local residents to tourists, parents of schoolchildren, students or visitors to cultural institutions. Some users connect from mobile devices, others from areas where internet access may be slower. Therefore, the technical efficiency of a website directly affects whether information will be accessible on time and without additional barriers.
For example, on a school website it is important that timetables, admissions information and contact details are available quickly. On a library website, the user should be able to find the events calendar or electronic catalogue without disruption. On a museum website, it is important that exhibition information, ticket details and opening hours are clearly visible and presented consistently, even if the page uses photographs or interactive elements.
How can Core Web Vitals be improved?
- Optimise images and other media. Large, uncompressed photos are often one of the main reasons for a slow LCP. On public-sector websites, especially museum or municipality portals, it is worth using appropriately sized images, modern formats and ensuring that the most important content is loaded first.
- Reduce excessive JavaScript use. Too many scripts can slow down the page’s response to user actions. If a website has many plugins, animations or third-party tools, it is worth assessing whether they are really necessary, especially in forms, search and navigation.
- Ensure a stable layout. Space for images, advert blocks, news bars or embedded elements should be planned in advance on the page. This avoids unexpected content shifts, which worsen the CLS score and make the website harder to use.
- Review font and style loading. Fonts loaded incorrectly or overly heavy style files can slow down page rendering. A clear, light and consistent design system helps not only with speed, but also with accessibility.
- Test under real conditions. Technical tests alone are not enough – it is important to assess how the website works on a phone, on a slower network or on an older device. This is especially relevant for organisations that serve users of different ages and with different digital skills.
How can the results be monitored?
Core Web Vitals can be monitored using Google Search Console and PageSpeed Insights. These tools help show which pages are causing problems and allow work to be prioritised according to the real impact on users. It is useful to check regularly not only the homepage, but also the most important service, contact, document and registration pages.
If personal data is processed on the website, for example through registration or enquiry forms, technical optimisation should be aligned with GDPR requirements. This means that third-party tools, tracking solutions or additional scripts must be used responsibly, with a clear assessment of their necessity, impact on privacy and impact on website performance.
In summary, Core Web Vitals help ensure that a public-sector website is fast, stable and convenient to use. This is important not only for search visibility, but also for day-to-day resident service, digital accessibility and trust in the organisation. A well-functioning website is not an added benefit, but an essential part of a quality public service.