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.
Got a burning SEO question?
Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.
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
-
How to Boost Your WordPress Website Speed to 95+ (Without Premium Plugins)
I'm reaching out for some advice on improving my WordPress website's speed. I'm currently using a free theme for this fusion magazine and aiming for a score of 95+ on Google PageSpeed Insights. I'm aware that premium plugins can significantly enhance performance, but I'm hoping to achieve similar results using primarily free solutions and manual optimizations.
Technical SEO | | mohammadrehanseo0 -
Unsolved Question about a Screaming Frog crawling issue
Hello, I have a very peculiar question about an issue I'm having when working on a website. It's a WordPress site and I'm using a generic plug in for title and meta updates. When I go to crawl the site through screaming frog, however, there seems to be a hard coded title tag that I can't find anywhere and the plug in updates don't get crawled. If anyone has any suggestions, thatd be great. Thanks!
Technical SEO | | KyleSennikoff0 -
Unsolved Capturing Source Dynamically for UTM Parameters
Does anyone have a tutorial on how to dynamically capture the referring source to be populated in UTM parameters for Google Analytics? We want to syndicate content and be able to see all of the websites that provided referral traffic for this specific objective. We want to set a specific utm_medium and utm_campaign but have the utm_source be dynamic and capture the referring website. If we set a permanent utm_source, it would appear the same for all incoming traffic. Thanks in advance!
Technical SEO | | peteboyd0 -
Duda Mobile no_redirect=true
Hi Guys, Just need some clarification if it's okay. I have a client who has the dudamobile software installed for a mobile friendly version of the site.Now I know that it put's on some JS to check if the user is visiting from a desktop or a mobile and then redirects. ?no_redirect=true https://moz.com/community/q/duplicate-content-resulting-from-js-redirect This is creating duplicate page issues when I run a deepcrawl of the site. I understand I can just exclude the URL's in Google's Search Console but I just wanted to double check though that this won't stop Google from indexing the mobile site? Sorry if it's a stupid question Kind Regards Neil
Technical SEO | | nezona1 -
Help. Recently my organic traffic has dropped 40%. Any advice / ideas?
Lately my organic traffic has dropped significantly as well as my adsense revenue. The moz report says, for example, my traffic is down 40%, but I a still #1 for that keyword. Also, in the last week, suddenly my number of indexed pages doubled. We had done some page rewriting and maybe messed that up. We've fixed that though. Webmaster tools is still picking up all of our old pages and the new ones. Background: We recently launched our new responsive website in March. March income was about the same as February. April dropped off suddenly (maybe late march - no sure) When we changed site, we did do 301's for all the old pages to the new ones Any ideas or advice as to why my traffic and revenue has dropped off so sharply? Never submitted questions before - not sure if I am supposed to put urls here so if you just google Home Spelling Words - that's my website. Thanks everyone!!!
Technical SEO | | kimtastic0 -
Sitemap indexed pages dropping
About a month ago I noticed my pages indexed from my sitemap are dropping.There are 134 pages in my sitemap and only 11 are indexed. It used to be 117 pages and just died off quickly. I still seem to be getting consistant search traffic but I'm just not sure whats causing this. There are no warnings or manual actions required in GWT that I can find.
Technical SEO | | zenstorageunits0 -
Mobile SERPS: how to optimize for call button
Hi, I have 2 questions about the "call" button on mobile google serps when doing a business name search: -since when is this button available in SERPS -is there anything specific you can do to actually have google display that call button (schema.org, ...) Kind regards Pieter
Technical SEO | | TruvoDirectories0 -
Web config redirects not working where a trailing slash is involved
I'm having real trouble with getting working redirects in place to use on a site we're re-launching with a modified url structure. Old URL: http://www.example.com/example_folder/ New URL: http://www.example.com/example-of-new-folder/ Now, where the old URL's have a trailing slash the web.config simply will not accept it. It says the URL can start with a slash, but not end with a slash. However, many of my URL's do end with a slash so I need a workaround. These are the rules I'm putting in place: <location path="example_folder/"></location> Thanks
Technical SEO | | AndrewAkesson0