Welcome to the world of core web vitals. If you have an exceedingly technical background, this article may pack less punch than you’re used to, but we hope it will still provide a fundamental overview of what core web vitals are and why they are important. Core web vitals are, well, vital. They represent the health of your website in the eyes of automated crawlers (artificial readers) that regularly scan your site to index information for search engines. Google has actually standardized a series of metrics to represent these vitals, which will hopefully lead to more consensus around delivering better user experiences online.
We specialize in LCP (Largest Contentful Paint), FID (First Input Display), and CLS (Cumulative Layout Shift)
While the core practices are considered more stable and measurable, in-depth troubleshooting and long-term strategic development may benefit from “softer” predictions that are still informed by secondary vitals.
We can help you make sense of measurements and uncover potential performance regressions before they occur.
We will provide a quick dive into the specific core web vitals down below in our FAQ. But for a moment, think back or try to understand what it was like in the early days of the internet. It was a true Wild West, with very little standardization, and no easy way to grade search results against each other. The lack of consensus web design practices left search firmly in the camp of unreliable novelty. Trustworthy sources without concrete offline reputations had no way to prove their credibility online. But as Core Web Vitals have become the lens for interpreting the underlying structure of all websites, we can more distinctly measure real-world user experiences with useful comparative data.
But not every website owner should have to become a programming wizard or computer engineer just to elevate the quality of the experience they are delivering to their users. You go into a business because of what you can bring to it. Our team is in business because of what we can bring to your website. While technical mastery is important, a lot of these concepts can be understood intuitively. Sites should load faster. They should look good on any variety of phones or computers. The content should be comprehensible, and the answers in search results should make sense relative to the questions being asked. But technically, users should just feel like everything works. Sites that feel broken are not tolerated, and underperformance across any of the Core Web Vitals is probably dragging down your CTR (click-through-rate) and damaging your reputation with search engines.
LCP is a metric that captures loading performance. Your largest content should begin to appear, or be “painted,” quickly. Google standards of practice dictate that a website’s LCP should occur within the first 2.5 seconds of a page’s loading to be considered part of a good user experience.
CLS is a metric that defines visual stability. Quite literally, this means that content should be stable and readable within a page. If a page’s continual loading causes text and images to jump around or change the dynamics of your page, then users can find themselves losing their place or frustratingly clicking in the wrong places at the last second. CLS measures the largest layout shift that occurs during the lifespan of a page’s activity. Sites with a layout shift score over 0.1 are considered unstable and need improvement.
FID is a metric used to track a page’s interactivity. Interactive websites are good websites. But websites that prompt interactivity need to be markedly efficient in handling button clicks and requests. From the time users initially dynamically interact with your page (click a button, for instance) to the time that your site begins to process the request, FID is the name of the game. To provide a good user experience, your website should have an FID score on all pages of 100 milliseconds or less.
Because there are so many variables to account for within each user’s unique experience, Core Web Vitals are rewarded when they serve the majority of your audience the majority of the time. Google rewards core vitals that track in the 75th percentile and above for all three metrics, segmented across the traffic from both desktop and mobile devices.
LCP is a metric that captures loading performance. Your largest content should begin to appear, or be “painted,” quickly. Google standards of practice dictate that a website’s LCP should occur within the first 2.5 seconds of a page’s loading to be considered part of a good user experience.
CLS is a metric that defines visual stability. Quite literally, this means that content should be stable and readable within a page. If a page’s continual loading causes text and images to jump around or change the dynamics of your page, then users can find themselves losing their place or frustratingly clicking in the wrong places at the last second. CLS measures the largest layout shift that occurs during the lifespan of a page’s activity. Sites with a layout shift score over 0.1 are considered unstable and need improvement.
FID is a metric used to track a page’s interactivity. Interactive websites are good websites. But websites that prompt interactivity need to be markedly efficient in handling button clicks and requests. From the time users initially dynamically interact with your page (click a button, for instance) to the time that your site begins to process the request, FID is the name of the game. To provide a good user experience, your website should have an FID score on all pages of 100 milliseconds or less.
Because there are so many variables to account for within each user’s unique experience, Core Web Vitals are rewarded when they serve the majority of your audience the majority of the time. Google rewards core vitals that track in the 75th percentile and above for all three metrics, segmented across the traffic from both desktop and mobile devices.