In 2021, Google is planning on taking up 'site vitality' as ranking factor. They will announce this six months before they will make it final.

I recommend not to wait with improving your website. It is Google's business to make sure their customers keep coming back. They want their users to say: “Google gives the best results”. That includes your website.

Google will start looking at three different metrics, that will make up your 'core web vitals'. They are:

  1. Pagespeed
  2. Interactivity
  3. Visual Stability.

I will explain the metrics in greater detail:

The first metric is 'Pagespeed'. With a specific focus on the 'Largest Contentful Paint (LCP)'. The LCP is the time it takes to load the biggest, and first visible element on your website. The less time it takes, the better. Less than 2,5 seconds is considered good, between 2,5 and 4 seconds is labelled mediocre and more than 4 seconds is just bad. (How to Optimize LCP)

Interactivity is partly measured with the 'First Input Delay (FID)'. The FID is a metric for how long it takes the website to react to a tap, scrolling or a mouse click of the user. For the FID, less than 100 milliseconds is good, more than 300 milliseconds is poor. (How to Optimize FID)

The last metric that Google will start looking at is the visual stability of a website. The company will measure the amount of jumping of elements as the page loads in (the 'cumulative layout shift'). (How to Optimize CLS)

Fortunately, the search machine conglomerate makes it really easy to see how our websites are performing. With PageSpeed Insights you can immediately tell what you and your web developer have to work on.

Leave a comment if you have any questions. Do not hesitate to email me on [email protected] (email) or direct message me on Twitter (@askGeffrey) when you are not comfortable with public discussion. We'll video chat and go through your website, together.

Source: Defining the Core Web Vitals metrics thresholds