In May 2020, website owners and SEO professionals were excited about the news from Google. The reason was Core Web Vitals. It is a new algorithm that evaluates websites by their loading speed. In other words, it analyzes how quickly the user can interact with the content. However, Covid-19 delayed the implementation of the update.
With this innovation, Google wants to increase the number of websites that meet user expectations. Also, it wants to reduce the number of websites with negative user experience. Therefore, the search engine will start paying more attention on how fast your content loads. In addition, it will consider the stability of your website’s layout elements. The speed of the user interaction with the contents also matters.
Web Vitals Metrics
Web Vitals consist of different metrics. Below there are the three main of them.
- Largest Contentful Paint (LCP) is a main content download speed. It can be an image, text block, video, heading, or other content. LCP shows how quickly the page loads. Thus, to provide a good user experience, LCP should be within 2.5 seconds after the page starts loading.
- First Input Delay (FID) is the waiting time before the first interaction with the content. FID measures the time starting from the user’s first interaction with your website to the browser’s actual response to that action. The user’s first interaction is clicking on a link, image, or button. If users click on one of the website’s elements and interaction happens very slowly, FID is high. Therefore, this means customers will have a bad experience. For a positive experience, web pages should have a FID of less than 100 milliseconds.
- Cumulative Layout Shift (CLS) is a metric of visual stability of the website. It shows the displacement of the web page elements during page loading. If the content is pushed aside after the website’s loading, CLS will assess how critical it is for visitors. To provide a good user experience, web pages should maintain a CLS of less than 0.1.
Why FID is an important metric?
Have you noticed that website slows down when you are scrolling the page? Certainly yes. You also have faced another problem, when you click on a button and it only works after a couple of seconds. All these problems happen due to a high First Input Delay. FID directly relates to user actions. It measures the experience of the users when they interact with the pages.
FID is the user’s first impression of your website’s responsiveness. Therefore, it has a vital role for building user loyalty. The biggest problems with the interactivity on the Internet appear during page load. That’s why it is crucial to focus on improving the experience with the first user of the website. It will have the greatest impact on improving the overall interactivity of the web.
Google recommends implementing, monitoring and tracking the behavior of real users. This will allow you to understand what kind of experience they get.
What is a good FID score?
For a good user experience, the value must not exceed 100 milliseconds. The goof benchmark for makeing sure you achieve this goal is the 75th percentile of page load. This score is for mobile and desktop.
How to measure FID?
The measurement of FID requires a real user interaction with your page. You can measure FID using the following tools.
- Chrome User Experience Report
- PageSpeed Insights
- Search Console (Core Web Vitals report)
How to optimize FID?
- Break up Long Tasks
- Optimize your page for interaction readiness
- Use a web worker
Break up Long Tasks
Optimize your page for interaction readiness
- Third-party script execution can delay interaction latency too. Sometimes, third-party scripts like advertisements can preempt the main scripts in priority. It can also impact bandwidth on the main thread and delay the page’s readiness for interaction. Try to prioritize downloads that you think offer the most value to users.
Use a web worker
There are different tools for measuring and improving FID. To measure your website’s FID, we recommend you to use one of the most user-centric tools. That tool is the Web Vitals Chrome Extension. It allows you to follow up on three key metrics for any web page you visit.
Experience is the key
User experience is at the core. To improve it, Google is continuously developing the web industry. For that purpose, Google considers new metrics that improve user’s search engine experience.