Google’s Core Web Vitals are a set of metrics designed to measure the user experience of websites. They focus on aspects such as loading performance, interactivity, and visual stability, all of which contribute to how users perceive and interact with your site. Recently, Google introduced a new core web vital named Interaction to Next Paint (INP), replacing the previous First Input Delay (FID). This change underscores Google’s commitment to prioritising engaging website experiences, making it essential for web development in Cardiff and beyond.
Understanding Google Core Web Vitals
Core Web Vitals encompass metrics that assess various aspects of website performance on a page-by-page basis. Factors such as page loading speed, interactivity, and visual stability are evaluated to gauge overall user experience. For businesses in Cardiff, understanding and optimising these metrics are critical for maintaining a competitive edge in the online landscape.
Recent Changes in Core Web Vitals
The replacement of FID with INP signifies a shift towards prioritising user engagement and responsiveness. INP focuses on analysing how quickly a website responds to user interactions, highlighting the importance of seamless user experiences. This change underscores the evolving nature of Google’s algorithms and the need for a web design company in cardiff to adapt accordingly.

Core Web Elements for 2024
1. Largest Contentful Paint (LCP):
This metric measures the loading speed of a webpage’s primary content. It specifically identifies the largest element visible within the viewport, such as an image or a block of text, and tracks how long it takes for that element to fully render. A fast LCP ensures that users can quickly access and engage with the most important content on a page, enhancing their overall browsing experience.
Improving Longest Contentful Paint (LCP) Score:
Longest Contentful Paint (LCP) measures the time it takes for a webpage’s primary content to load, impacting user experience. Enhance your LCP score with these best practices:
- Optimise server response times and server proximity to users.
- Utilise Content Delivery Networks (CDNs) to serve static content efficiently.
- Cache content rarely changes to reduce loading times.
- Optimise CSS by minifying, inlining critical CSS, and deferring non-critical CSS.
- Minimise client-side rendering by limiting JavaScript usage.
- Compress images to reduce file sizes and improve loading speed.
2. Cumulative Layout Shift (CLS):
CLS evaluates the visual stability of a webpage by measuring any unexpected layout shifts that occur during the loading process. These shifts can be disruptive for users, causing buttons or links to move unexpectedly, leading to accidental clicks or frustration. By minimising CLS, websites can ensure that content remains consistently positioned, providing a smoother and more predictable browsing experience.
Improving Cumulative Layout Shift (CLS) Score:
Cumulative Layout Shift (CLS) evaluates a page’s visual stability, measuring sudden layout changes. Improve your CLS score by:
- Using fixed-size attribute measurements for media elements.
- Providing designated space for ads to prevent layout shifts.
- Adding new UI elements below the fold to minimise disruptions.
- Aiming for a CLS measurement of less than 0.1 to ensure a stable layout.
3. Interaction to Next Paint (INP):
INP assesses the responsiveness of a webpage to user interactions, such as clicks or taps. It measures the time it takes for the page to update visually after a user engages with it, indicating how quickly the website responds to user actions. A low INP value signifies a more responsive and interactive user experience, facilitating smoother navigation and engagement with the site’s content.
Improving Interaction to Next Paint (INP) Score:
Interaction to Next Paint (INP) measures how quickly a website responds to user actions. Enhance your INP score by:
- Minimising JavaScript execution to reduce processing time.
- Implementing code splitting and lazy loading to optimise resource usage.
- Prioritising rendering of critical elements for user interactions.
- Utilising server-side rendering or static site generation for faster content delivery.
- Ensuring quick rendering of above-the-fold content to prioritise user engagement.
- Implementing lazy loading for non-critical content to further improve performance.
Importance of Core Web Vitals
- Importance of Scoring Green: Achieving favorable scores on core web vitals is paramount as it directly impacts both SEO rankings and user experience enhancement.
- SEO Rankings Benefit: Green scores indicate that a website meets Google’s standards for performance and user experience, which positively influences its search engine rankings.
- Enhanced User Experience: Green scores signify a smoother and more satisfying browsing experience for users, fostering higher engagement and retention rates.
- Decreased Visibility and Engagement: Poor performance in core web vitals can lead to reduced visibility in search engine results pages (SERPs) and diminished engagement levels from users, impacting overall website success.
- Impact on Website Success: The performance of core web vitals is pivotal for a website’s success, directly influencing its ability to attract and retain users.
- Striving for Sustainable Growth: Prioritising optimisation of core web vitals is essential for businesses in Cardiff to ensure sustainable growth and maintain competitiveness in the online landscape.
- Achieving Competitive Edge: By focusing on core web vitals, businesses can distinguish themselves from competitors, attract a wider audience, and retain more users, ultimately gaining a competitive edge in the market.
Optimising Core Web Vitals
To enhance core web vitals, businesses in Cardiff specialising in web development can implement several strategies. These include optimising images for page speed, minimising JavaScript execution, and prioritising visible content rendering. By focusing on these key areas, web development cardiff companies can improve website performance, offering users a smoother browsing experience and boosting engagement and retention rates.

Other Factors Affecting Page Experience
1. Mobile-Friendliness: It’s crucial to ensure that websites are optimised for mobile devices, providing a seamless browsing experience across various screen sizes. Mobile optimisation enhances accessibility and usability, catering to the growing number of users accessing the internet via smartphones and tablets.
2. Safe Browsing: Implementing robust security measures is essential to protect users from malware, viruses, and other online threats. By prioritising safe browsing, businesses can safeguard user data and instill trust and confidence in their online platforms.
3. HTTPS: Utilising the secure HTTPS protocol encrypts data transmission, enhancing user privacy and bolstering trust in the website’s credibility. HTTPS is vital for protecting sensitive information and preventing unauthorised access to user data.
4. No Intrusive Interstitials: Avoiding intrusive pop-up ads or overlays that obstruct content is crucial for maintaining a positive user experience. By minimising distractions, businesses can ensure seamless navigation and engagement on their websites.
Businesses in Cardiff must prioritise addressing these factors collectively to optimise website performance and enhance user satisfaction comprehensively.
Conclusion:
As Google continues to prioritise user experience in its search rankings, businesses in Cardiff must adapt to stay ahead of the competition. By understanding and optimising Google Core Web Vitals, companies can enhance their website’s performance, visibility, and user engagement. At Head45 Ltd, we specialise in crafting exceptional websites that prioritise user experience and performance. To improve your internet visibility and experience long-term success, get in contact with us right now.