Google Updates Cumulative Layout Shift Scoring
Cumulative Layout Shift scoring was updated by Google to make it more accurate and fair
Whiteboard Wednesdays | Core Web Vitals | Cumulative Layout Shift
Hear from Emma Buchholz and Zili Zhang of Gorilla Group and Trevor Pyle of Quantum Metric as they discuss Core Web Vitals and break down Cumulative Layout Shift. Learn how a bad CLS score can lead to a poor user experience and how to optimize your score.
Cumulative Layout Shift (CLS) New Google Ranking Factor | Digital Marketing News 2020
Cumulative Layout Shift (CLS) is a Google metric, that measures a user experience event.
This metric is said to become a ranking factor in 2021.
CLS is the unexpected shifting of web page elements while the page is still downloading.
The kinds of elements that tend to cause shift are fonts, images, videos, contact forms, buttons and other kinds of content.
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Minimizing CLS is important, because pages that shift around, can cause a poor user experience.
A poor CLS score is indicative of coding issues that can be solved.
According to Google there are 5 reasons, why Cumulative Layout Shift happens:
1. Images without dimensions
2. Ads, embeds, and iframes without dimensions
3. Dynamically injected content
4. Web Fonts causing FOIT/FOUT
5. Actions waiting for a network response before updating DOM
How To Optimize CLS?
Images and videos need to have the height, and width dimensions declared in the HTML.
With regard to responsive images, make sure that the different images sizes for the different viewports use the same aspect ratio.
Google recommends using AspectRatioCalculator.com to calculate the aspect ratios. It’s a good resource.
How Cumulative Layout Shift is Calculated?
1. Impact fraction is a measurement of, how much space an unstable element takes up in the viewport.
2. The distance fraction is the amount of space, that the page element has moved from the original position to the final position.
Cumulative Layout Score is calculated, by multiplying the Impact Fraction by the Distance Fraction: 0.75 x 0.25 = 0.1875
How to Measure CLS?
There are two ways to measure CLS – 1. Lab & 2. Field.
It’s not necessary to understand how to do the calculations yourself. But just knowing about it and what it is important because this metric is scheduled to become a ranking factor sometime in 2021.
Hope this information helps you in anyway. Having any questions, query or suggestions, please feel free to comment below.
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Core Web Vital: Cumulative Layout Shift – What Is It? How To Optimise It?
In this video I’ll be discussing one of the key Core Web Vitals that will become an SEO ranking factor in 2021 called Cumulative Layout Shift (CLS).
I’ll be covering in great detail:
-What is Cumulative Layout Shift?
-Common Cumulative Layout Shift issues
-How to optimise these common issues
-What tools do you have at your disposal to identify these Cumulative Layout Shift issues
Core Web Vitals Overview? 00:32
What is Cumulative Layout Shift? 01:35
Common Cumulative Layout Shift issues 02:50
How to optimise these common issues? 06:00
What tools to identify Cumulative Layout Shift issues 09:02
Join The SEO Tribe Facebook Group: https://www.facebook.com/groups/612374909625258/
#cumulativelayoutshift #corewebvital #SEO
Avoiding layout shift by putting the CSS in charge – HTTP 203
Jake and Surma chat about layouts that put the content in charge, vs layouts that put the CSS in charge, and why that difference matters.
Jake’s ancient article → https://goo.gle/3kLxWBd
More videos in the HTTP 203 series → http://goo.gle/HTTP203
Subscribe to Google Chrome Developers here → https://goo.gle/ChromeDevs
Also, if you enjoyed this, you might like the HTTP203 podcast → https://goo.gle/HTTP203Podcast
#HTTP203 #ChromeDeveloper #WebDev