Moz Q&A is closed.
After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Sudden Drop in Mobile Core Web Vitals
-

For some reason, after all URLs being previously classified as Good, our Mobile Web Vitals report suddenly shifted to the above, and it doesn't correspond with any site changes on our end.
Has anyone else experience something similar or have any idea what might have caused such a shift?
Curiously I'm not seeing a drop in session duration, conversion rate etc. for mobile traffic despite the seemingly sudden change.
-
I can’t understand their algorithm for core web vitals. I have made some technical updates to our website for speed optimization, but the thing that happened in the search console is very confusing for my site.

For desktops, pages are indexed as good URLs
while mobile-indexed URLs are displayed as poor URLs.
Our website is the collective material for people looking for Canada immigration (PAIC), and 70% of the portion is filled with text only. We are using webp images for optimization, still it is not passing Core Web Vitals.I am looking forward to the expert’s suggestion to overcome this problem.
-
I can’t understand their algorithm for core web vitals. I have made some technical updates to our website for speed optimization, but the thing that happened in the search console is very confusing for my site.


For desktops, pages are indexed as good URLs
while mobile-indexed URLs are displayed as poor URLs.
Our website is the collective material for people looking for Canadian immigration (PAIC), and 70% of the portion is filled with text only. We are using webp images for optimization, still it is not passing Core Web Vitals.I am looking forward to the expert’s suggestion to overcome this problem.
-
@rwat Hi, did you find a solution?
-
Yes, I am also experiencing the same for one of my websites, but most of them are blog posts and I am using a lot of images without proper optimization, so that could be the reason. but not sure.
It is also quite possible that Google maybe adding some more parameters to their main web critical score.
Browse Questions
Explore more categories
-
Moz Tools
Chat with the community about the Moz tools.
-
SEO Tactics
Discuss the SEO process with fellow marketers
-
Community
Discuss industry events, jobs, and news!
-
Digital Marketing
Chat about tactics outside of SEO
-
Research & Trends
Dive into research and trends in the search industry.
-
Support
Connect on product support and feature requests.
Related Questions
-
Unsolved Google URL inspection live test rendering issue.
Hi Everyone, This is my first post on Moz. I have been trying to get this thing sorted and have read everywhere and everyone just says don't worry about it. I would really like some advice/suggestions on this it will be really helpful. When I use the Google URL inspection tool from the Google search console the page rendering is completely broken. The tool refuses to load resources each time. At end of the day that's how the website is rendered in Google cache. I have already tried disabling cache plugins and Cloudflare but nothing works. site - nationalcarparts.co.nz
Support | | caitlinrolex789
This is how it renders when using URL inspection tool -
https://prnt.sc/7XKHtEU01gEl and if you check cache:https://nationalcarparts.co.nz this is how Google is caching it. Plugins I am using - Elementor Version 3.6.1, Elementor Pro Version 3.6.4, Exclusive Addons Elementor Version 2.5.4, Exclusive Addons Elementor Pro Version 1.4.6, WP- rocket, Cloudflare Pro plan with the plugin. Please if someone has fixed this issue and has a possible solution for it. Thanks cacheissue1.PNG1 -
Breadcrumbs on Mobile How important are they for SEO?
Due to Poor unsightly look of breadcrumbs and the space it takes up above the fold we only employ breadcrumbs on our desktop version. Breadcrumbs are hidden from view on mobile version. However as mobile first indexing is now in play what technical SEO impacts will this have? one thing that comes to mind is crawling deeper pages where breadcrumbs made them accessible in less than 3 link clicks? But i am unsure now of the impacts of not having breadcrumbs visible for mobile version of our site.
Technical SEO | | oceanstorm0 -
Crawl rate dropped to zero
Hello, I recently moved my site in godaddy from cpanel to managed wordpress. I bought this transfer directly from GoDaddy customer service. in this process they accidentally changed my domain from www to non www. I changed it back after the migration, but as a result of this sites craw rate from search console fell to zero and has not risen at all since then. In addition to this website does not display any other errors, i can ask google manually fetch my pages and it works as before, only the crawl rates seems to be dropped permanently. GoDaddy customer service also claims that do not see any errors but I think, however, that in some way they caused this during the migration when the url changed since the timing match perfectly. also when they accidentally removed the www, crawl rate of my sites non www version got up but fell back to zero when I changed it back to www version. Now the crawl rate of both www and non www version is zero. How do I get it to rise again? Customer service also said that the problem may be related to ftp-data of search console? But they were not able to help any more than .Would someone from here be able to help me with this in anyway please?
Technical SEO | | pok3rplay3r0 -
Sudden jump in the number of 302 redirects on my Squarespace Site
My Squarespace site www.thephysiocompany.com has seen a sudden jump in 302 redirects in the past 30 days. Gone from 0-302 (ironically). They are not detectable using generic link redirect testing sites and Squarespace have not explanation. Any help would be appreciated.
Technical SEO | | Jcoley0 -
Why has my search traffic suddenly tanked?
On 6 June, Google search traffic to my Wordpress travel blog http://www.travelnasia.com tanked completely. There are no warnings or indicators in Webmaster Tools that suggest why this happened. Traffic from search has remained at zero since 6 June and shows no sign of recovering. Two things happened on or around 6 June. (1) I dropped my premium theme which was proving to be not mobile friendly and replaced it with the ColorMag theme which is responsive. (2) I relocated off my previous hosting service which was showing long server lag times to a faster host. Both of these should have improved my search performance, not tanked it. There were some problems with the relocation to the new web host which resulted in a lot of "out of memory" errors on the website for 3-4 days. The allowed memory was simply not enough for the complexity of the site and the volume of traffic. After a few days of trying to resolve these problems, I moved the site to another web host which allows more PHP memory and the site now appears reliably accessible for both desktop and mobile. But my search traffic has not recovered. I am wondering if in all of this I've done something that Google considers to be a cardinal sin and I can't see it. The clues I'm seeing include: Moz Pro was unable to crawl my site last Friday. It seems like every URL it tried to crawl was of the form http://www.travelnasia.com/wp-login.php?action=jetpack-sso&redirect_to=http://www.travelnasia.com/blog/bangkok-skytrain-bts-mrt-lines which resulted in a 500 status error. I don't know why this happened but I have disabled the Jetpack login function completely, just in case it's the problem. GWT tells me that some of my resource files are not accessible by GoogleBot due to my robots.txt file denying access to /wp-content/plugins/. I have removed this restriction after reading the latest advice from Yoast but I still can't get GWT to fetch and render my posts without some resource errors. On 6 June I see in Structured Data of GWT that "items" went from 319 to 1478 and "items with errors" went from 5 to 214. There seems to be a problem with both hatom and hcard microformats but when I look at the source code they seem to be OK. What I can see in GWT is that each hcard has a node called "n [n]" which is empty and Google is generating a warning about this. I see that this is because the author vcard URL class now says "url fn n" but I don't see why it says this or how to fix it. I also don't see that this would cause my search traffic to tank completely. I wonder if anyone can see something I'm missing on the site. Why would Google completely deny search traffic to my site all of a sudden without notifying any kind of penalty? Note that I have NOT changed the content of the site in any significant way. And even if I did, it's unlikely to result in a complete denial of traffic without some kind of warning.
Technical SEO | | Gavin.Atkinson1 -
Sudden drop in Rankings after 301 redirect
Greetings to Moz Community. Couple of months back, I have redirected my old blog to a new URL with 301 redirect because of spammy links pointed to my old blog. I have transfer all the posts manually, changed the permalink structure and 301 redirected every individual URL. All the ranking were boosted within couple of weeks and regained the traffic. After a month I have observed, the links pointed to old site are showing up in Webmaster Tools for the new domain. I was shocked (no previous experience) and again Disavowed all links. Today, all the positions went down for new domain. My questions are: 1. Did the Disavow tool worked this time with new domain? All the links pointed to old domain were devaluated? Is this the reason for ranking drop? Or 2. 301 Old domain with Unnatural links causes the issue? 3. Removing 301 will help to regain few keyword positions? I'm taking this as a case study. Already removed the 301 redirect. Looking for solid discussion.Thanks.
Technical SEO | | praveen4390 -
Google Impressions Drop Due to Expired SSL
Recently I noticed a huge drop in our clients Google Impressions via GWMT from 900 impressions to 70 overnight on October 30, 2012 and has remained this way for the entire month of November 2012. The SSL Cert had expired in mid October due to the notification message for renewal going to the SPAM folder and being missed. Is it possible for an SSL expiry to be related to this massive drop in daily impressions which in-turn has also effected traffic? I also can't see any evidence of duplicate pages (ie. https and http) being indexed but to be honest I'm not the one doing the SEO therefore haven't been tracking this. Thanks for your help! Chris
Technical SEO | | MeMediaSEO0