Core Web Vitals is a new ranking signal introduced by Google.

The signal consists of a number of factors that Google thinks are important when it comes to the user experience offered by a web page.

Specifically, the Core Web Vitals assessment measures 3 components of page speeds:

  • Overall speed (Largest Contentful Paint)
  • Interactivity (First Input Delay)
  • Visual stability (Cumulative Layout Shift)

The new signal is still in the early stages of development and will be slowly rolled out, beginning in May of 2021. In order to help webmasters adjust to the new signal, Google has provided a guide that explains the new signal in detail.

In this guide, we'll build on that guide, and explain everything you need to know about this new metric, and what you can do to pass the Core Web Vitals assessment.