Core Web Vitals

Core Web Vitals are a set of metrics introduced by Google to assess the usability and performance of a website. These metrics focus on a page’s loading speed, interactivity and visual stability. The Core Web Vitals are an important ranking factor in technical SEO and play a decisive role in how well your page performs in the search results.

Why Core Web Vitals matter for technical SEO

• Loading speed (LCP: Largest Contentful Paint): This metric measures how long it takes for the largest visible element on a page to load. A slow loading time can lead to a poor user experience and have a negative effect on your ranking.
• Interactivity (INP: Interaction to Next Paint): This metric measures how quickly your page responds to user interactions (e.g. a click on a button). Since March 2024, INP has replaced the earlier metric FID (First Input Delay). A fast response is crucial for a positive user experience.
• Visual stability (CLS: Cumulative Layout Shift): This metric measures how stable the content on your page is while it loads. A high CLS value means that elements shift during loading, which disrupts the user experience.

Best practices for optimising Core Web Vitals in technical SEO

• Optimise loading speed (LCP): Reduce the size of images and videos, use lazy loading and make sure your web server responds quickly. Also use caching and content delivery networks (CDNs) to improve the loading time.
• Improve interactivity (INP): Minimise JavaScript and make sure the most important content loads quickly. Use browser caching and asynchronous loading of resources to reduce delays.
• Increase visual stability (CLS): Avoid layout shifts by setting dimensions for images and videos and giving dynamic content (such as ads) placeholders to keep the layout stable.
• Regular monitoring: Use tools such as Google PageSpeed Insights or Google Search Console to check your Core Web Vitals regularly and spot potential problems early.
• Use lazy loading: Load images and videos only when they come into view to improve loading speed and optimise the user experience.

Conclusion

Optimising the Core Web Vitals is crucial for the performance and usability of your website. Fast loading times, responsive interactivity and visual stability not only contribute to a better user experience but also improve your website’s ranking in the search results. The Core Web Vitals are a central element of technical SEO that you should monitor and optimise continuously.