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#1 10-08-2020 05:40:49

sdn
Member
From: UK
Registered: 05-29-2007
Posts: 838

Google WMT: Core Web Vitals, Mobile Report - Need improvement

Google is reporting that almost all pages of our site require improvement when assessed for mobile use.

Need improvement   
===============
CLS issue: more than 0.1 (mobile)   
Pages affected: 1,344
Status: Poor   

CLS issue: more than 0.25 (mobile)   
Pages affected: 120
Status: Need improvement   

LCP issue: longer than 2.5s (mobile)   
Pages affected: 120
Status: Need improvement

Desktop report is much better:
=======================
0 poor URLs
51 URLs need improvement
1,600 good URLs


How can we improve our results for Mobile? We have a fast server with plenty of spare capacity.

Some problems are  the same old issues as before plus some new ones where pages have YouTube video links. They are really slow. Ironically, many of the blockages are generated by Google services like fonts, Analytics, YouTube, Reviews Badge. How can we lazy load these as none are important for the visible page loading.

Will the long awaited K9 software update address any of these issues?



Here is the PageSpeedInsights report for one page with a YouTube video (overall score = 52 compared to around 74 for similar page without a video).

Lab Data
=======
First Contentful Paint 2.6 s
Speed Index 4.4 s
Largest Contentful Paint 4.0 s
Time to Interactive 8.3 s
Total Blocking Time 410 ms
Cumulative Layout Shift 0.489

Opportunity - Estimated Savings
===============================
Remove unused JavaScript 2.53 s
Eliminate render-blocking resources 0.73 s
Remove unused CSS 0.6 s

Last edited by sdn (10-08-2020 05:55:50)


Simon

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#2 10-08-2020 07:59:36

webmaster
Administrator
From: York, PA
Registered: 04-20-2001
Posts: 19557
Website

Re: Google WMT: Core Web Vitals, Mobile Report - Need improvement

CLS = Cumulative Layout Shift - meaning the layout is shifting or jumping more on mobile than it should.

LCP = Largest Contentful Paint - meaning that something (some DOM element) is taking too long to render in the browser.

These are both issues with either the amount of info being presented on the page you're testing (too many items, too many boxes, too may menu items), the number (and/or size) of the images being loaded on the page (too many items and/or images not optimized for items), and/or the layout/skin itself is too large or laid out improperly.

What was the URL this test was run against?  Can you run the same tests against a small page like the /CompanyInfo page to rule out issues with banners and/or too many items on the test page? 

Remember, there is a balance between presenting content the way Google optimally would like to see, it and the way you want to present it. CLS and LCP issues are not going to hurt your rankings.  They may hurt time on page, pageviews and conversion rates.  They are indicators of how you may be able to make your site function better in order to retain and convert traffic better.  Your current setup may already be optimal for you.


Nick Hendler

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#3 10-08-2020 08:21:08

sdn
Member
From: UK
Registered: 05-29-2007
Posts: 838

Re: Google WMT: Core Web Vitals, Mobile Report - Need improvement

A simple page like https://quasarelectronics.co.uk/CompanyInfo gets 94 on https://developers.google.com/speed/pagespeed/insights/ but a page like https://quasarelectronics.co.uk/Item/ve … te-edition just got 28. But of course that page we want to rank well and /CompanyInfo is of no consequence.

That page is about as bad a result as we get because it has a number of product images, longish description and a couple of related products. We have removed the 3rd tier of category links as they produce a lot of extra weight to a page.

All of our images are optimised and I am running out of ideas for other easy speed increases. This is why I am looking for other solutions like deferring loading Analytics, YouTube video, etc.

Last edited by sdn (10-08-2020 10:11:21)


Simon

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#4 10-08-2020 11:51:45

zanart
Member
From: bedford
Registered: 04-02-2008
Posts: 1650

Re: Google WMT: Core Web Vitals, Mobile Report - Need improvement

I get 59 when I run your Velleman K2400W page.
It looks like the embedded you tube iframe is delaying the page load.

Have you tried temporarily removing the embedded video and re running the page speed insights?


- Euorpacart 8

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#5 10-09-2020 07:59:57

webmaster
Administrator
From: York, PA
Registered: 04-20-2001
Posts: 19557
Website

Re: Google WMT: Core Web Vitals, Mobile Report - Need improvement

Drop the video (temporarily) and see how much it improves.


Nick Hendler

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#6 10-09-2020 09:10:04

sdn
Member
From: UK
Registered: 05-29-2007
Posts: 838

Re: Google WMT: Core Web Vitals, Mobile Report - Need improvement

It goes up to about 75 with no video. The speed hit for just having a product video is silly.


Simon

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#7 10-12-2020 08:23:31

webmaster
Administrator
From: York, PA
Registered: 04-20-2001
Posts: 19557
Website

Re: Google WMT: Core Web Vitals, Mobile Report - Need improvement

We may be able to defer loading of videos to help with that.  Will look into it.


Nick Hendler

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#8 10-12-2020 09:36:15

sdn
Member
From: UK
Registered: 05-29-2007
Posts: 838

Re: Google WMT: Core Web Vitals, Mobile Report - Need improvement

That would be good.

I have found a sort of work-around for now using a slightly modified version of the fix described at https://techbrij.com/tools/youtube-vide … rator.php. It is not ideal but it does at least offer a temporary fix. Score is back up around 70-75 - see https://quasarelectronics.co.uk/Item/ve … k-edition.

I have noticed that page speed test results bounce up and down by a big margin from 24 worst case to about 50 average. I suppose it is due to fluctuating delays waiting for these 3rd party resources to load.

Last edited by sdn (10-12-2020 09:45:18)


Simon

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#9 10-12-2020 14:54:38

webmaster
Administrator
From: York, PA
Registered: 04-20-2001
Posts: 19557
Website

Re: Google WMT: Core Web Vitals, Mobile Report - Need improvement

Thanks for the pointer.  Will look into a similar method.

I suppose it is due to fluctuating delays waiting for these 3rd party resources to load.

Perhaps.  Or different servers doing the check at Google.  But most likely resource loading issues.  Loading a page with just the skin and text (like /CompanyInfo) is a good way to determine what/where loading issues might be.


Nick Hendler

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