This episode is a great overview of Google's new Core Web Vitals metrics that are being rolled out as part of a major update to their ranking algorithm.
I speak with Arjen Karel from the Netherlands who is a 'page speed wizard', having guided brands including Nestle, Harvard University and Erasmus to better website performance.
Core web vitals includes 3 key metrics that were introduced in Google's June algorithm update which are:
- First Input Delay (FID): measures interactivity and the time from when a user first interacts with your site (ie. when they click a link, tap on a button) to the time when the browser is actually able to respond to that interaction. (Remember those infuriating clicks when the button doesn't appear to do anything?!)
- Cumulative Layout Shift (CLS): measures visual stability. This is how the page layout changes and shifts around as different components load.
You can be slow by mistake, or slow by design. If you make a mistake, that's fixable. Slow by design is a design choice, and that's ok; just make sure you're faster than your competitors!
— Arjen Karel, corewebvitals.io
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