Core Web Vitals: Google’s technical benchmark for user experience
Core Web Vitals (CWV) are specific technical metrics that Google uses to measure and evaluate the real user experience on a website. They are part of the so-called “Page Experience Signals” and a confirmed ranking factor. Their main aim is to make the technical performance of a page measurable from the user’s perspective.
Why are Core Web Vitals so important for your ranking?
Google wants to present its users with websites that are not only relevant in terms of content, but also fast, responsive and easy to use. A technically slow or unstable site leads to frustration, high bounce rates and poor user engagement signals.
With the introduction of Core Web Vitals, Google has created a standardized method to measure the technical quality of the user experience directly. Websites that score well in these areas are given a slight ranking advantage over technically inferior competitor sites. Optimization is therefore essential for every modern OnPage optimization is indispensable.
The 3 pillars of Core Web Vitals in detail
The CWV consists of three main metrics, each measuring a different aspect of the user experience.
1. largest contentful paint (LCP) – loading speed
The LCP measures the time in seconds that elapses from clicking on the link until the largest visible element (usually an image, video or a large text block) is fully loaded in the browser window.
- What it means: How fast does the page feel for the user?
- Google’s target value: Under 2.5 seconds.
2. interaction to next paint (INP) – interactivity
The INP (successor to FID – First Input Delay) measures the responsiveness of a page. It records the time it takes from a user interaction (e.g. a click on a button, opening a menu) to the visible reaction of the page. A high value means that the page appears sluggish or “laggy”.
- What it means: How quickly and smoothly does the page respond to input?
- Google’s target value: Under 200 milliseconds.
3. cumulative layout shift (CLS) – visual stability
The CLS measures how stable the layout of a page is during loading. It detects unexpected shifts of elements that occur, for example, when advertising banners or images are subsequently loaded and push down the already visible content. This can lead to users inadvertently clicking on the wrong elements.
- What it means: Is the page stable or does the content jump when loading?
- Google’s target value: A value of less than 0.1.
How can you improve your Core Web Vitals?
The optimization is technical, but some basic levers are:
- Optimize images: Compress images and use modern formats (e.g. WebP) to improve the LCP.
- Reduce JavaScript: Unnecessary or poorly optimized JavaScript code is a common cause of poor INP.
- Reserve space for images: Specify fixed sizes in the code for all images and ads so that the browser can reserve the space and the layout does not shift (CLS).
- Choose fast hosting: A high-performance server is the basis for good loading times.
You can measure the values with tools such as the Google Search Console or PageSpeed Insights.
Conclusion: Technical excellence is the basis for good content
Core Web Vitals have permanently changed technical SEO. It is no longer enough to simply have excellent content; it must also be presented on a technically flawless and fast website. By optimizing your Core Web Vitals, you invest directly in the satisfaction of your users and create a solid technical basis on which your content can develop its full ranking potential.