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 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 -
Google News and Discover down by a lot
Hi,
Technical SEO | | SolenneGINX
Could you help me understand why my website's Google News and Discover Performance dropped suddenly and drastically all of a sudden in November? numbers seem to pick up a little bit again but nowhere close what we used to see before then0 -
What are best options for website built with navigation drop-down menus in JavaScript, to get those menus indexed by Google?
This concerns f5.com, a large website with navigation menus that drop down when hovered over. The sub nav items (example: “DDoS Protection”) are not cached by Google and therefore do not distribute internal links properly to help those sub-pages rank well. Best option naturally is to change the nav menus from JS to CSS but barring that, is there another option? Will Schema SiteNavigationElement work as an alternate?
Technical SEO | | CarlLarson0 -
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 -
Do web design footer links of websites you build have value?
Hi everyone. I am trying to build up DA for my site and create linking opportunities with my clients sites but I am not seeing any link value. I just did a redesign with another firm and we built out www.denbow.com . We have links to our sites in the footer but for some reason it's not being indexed. Can someone help me understand if it is good to put built by a href link in the footer? I've built almost 12 sites in my first 1.5 years of being in business for myself and I thought the links would pass some sort of value. Thanks in advance for the help and education. Regards, Noob Gary
Technical SEO | | gdavey0 -
Fixing a website redirect situation that resulted in drop in traffic
Hi, I'm trying to help someone fix the following situation: they had a website, www.domain.com, that was generating a steady amount of traffic for three years. They then redesigned the website a couple of months ago, and the website developer redirected the site to domain.com but did not set up analytics on domain.com. We noticed that there was a drop in traffic to www.domain.com but have no idea if domain.com is generating any traffic since analytics wasn't installed. To fix this situation, I was going to find out from the developer if there was a good reason to redirect the site. What would have prompted the developer to do this if www.domain.com had been used already for three years? Then, unless there was a good reason, I would change the redirect back to what it was before - domain.com redirecting to www.domain.com. Presumably this would allow us to regain the traffic to the site www.domain.com that was lost when the redirect was put in place. Does this sound like a reasonable course of action? Is there anything that I'm missing, or anything else that I should do in this situation? Thanks in advance! Carolina
Technical SEO | | csmm0