Core Web Vitals are a set of factors that measure the performance and user experience of websites. They were developed by Google and are part of the Page Experience Update, which was released in May 2021. The three Core Web Vitals are:

1. Largest Contentful Paint (LCP): This factor measures the loading time of the largest visible content on a page, for example an image or a text block. A good LCP value is less than 2.5 seconds.
2. First Input Delay (FID): This factor measures the interactivity of a page by measuring the time it takes for the user to respond to an interaction (e.g. clicking on a link or button). A good FID value is less than 100 milliseconds.
3. Cumulative Layout Shift (CLS): This factor measures the stability of a page by measuring the amount of unexpected layout shifts that occur while the page is loading. A good CLS value is below 0.1.

These core web vitals are important for neuroweb design as they help to optimise the load time, interactivity and stability of a website, which in turn can help to improve the user experience. A website with fast loading times, quick interactions and a stable layout is perceived as pleasant by the user, while a website with long loading times, delays in interaction and unexpected layout shifts can lead to frustration and a poor user experience.

By optimising core web vitals, neuroweb designers can ensure that the user experience on the website is as seamless and intuitive as possible, which can help to increase dwell time on the website, reduce bounce rate and ultimately lead to a higher conversion rate.