Images have also been a key part of the web. They communicate ideas instantly, but they are also a lot heavier than text to load. This means that it’s essential to get loading and displaying them right, if you want to give your users a fantastic first impression. An excerpt from [Addy's new book](https://www.smashingmagazine.com/2021/04/image-optimization-pre-release/) (also, check a [free PDF preview](http://provide.smashingmagazine.com/eBooks/image-optimization-sample-chapter.pdf)).

How are Core Web Vitals measured? How do you know your fixes have had the desired effect and when will you see the results in Google Search Console? Let’s figure it out.

Google Core Web Vitals will soon become a ranking factor. In this post, we'll explain what this feature includes and how to optimize for it!

Cumulative Layout Shift (CLS) Visualiser.