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
-
Best redirect destination for 18k highly-linked pages
Technical SEO question regarding redirects; I appreciate any insights on best way to handle. Situation: We're decommissioning several major content sections on a website, comprising ~18k webpages. This is a well established site (10+ years) and many of the pages within these sections have high-quality inbound links from .orgs and .edus. Challenge: We're trying to determine the best place to redirect these 18k pages. For user experience, we believe best option is the homepage, which has a statement about the changes to the site and links to the most important remaining sections of the site. It's also the most important page on site, so the bolster of 301 redirected links doesn't seem bad. However, someone on our team is concerned that that many new redirected pages and links going to our homepage will trigger a negative SEO flag for the homepage, and recommends instead that they all go to our custom 404 page (which also includes links to important remaining sections). What's the right approach here to preserve remaining SEO value of these soon-to-be-redirected pages without triggering Google penalties?
Technical SEO | | davidvogel1 -
Unsolved Duplicate LocalBusiness Schema Markup
Hello! I've been having a hard time finding an answer to this specific question so I figured I'd drop it here. I always add custom LocalBusiness markup to clients' homepages, but sometimes the client's website provider will include their own automated LocalBusiness markup. The codes I create often include more information. Assuming the website provider is unwilling to remove their markup, is it a bad idea to include my code as well? It seems like it could potentially be read as spammy by Google. Do the pros of having more detailed markup outweigh that potential negative impact?
Local Website Optimization | | GoogleAlgoServant0 -
Solved How to solve orphan pages on a job board
Working on a website that has a job board, and over 4000 active job ads. All of these ads are listed on a single "job board" page, and don’t obviously all load at the same time. They are not linked to from anywhere else, so all tools are listing all of these job ad pages as orphans. How much of a red flag are these orphan pages? Do sites like Indeed have this same issue? Their job ads are completely dynamic, how are these pages then indexed? We use Google’s Search API to handle any expired jobs, so they are not the issue. It’s the active, but orphaned pages we are looking to solve. The site is hosted on WordPress. What is the best way to solve this issue? Just create a job category page and link to each individual job ad from there? Any simpler and perhaps more obvious solutions? What does the website structure need to be like for the problem to be solved? Would appreciate any advice you can share!
Reporting & Analytics | | Michael_M2 -
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 -
Why can't google mobile friendly test access my website?
getting the following error when trying to use google mobile friendly tool: "page cannot be reached. This could be because the page is unavailable or blocked by robots.txt" I don't have anything blocked by robots.txt or robots tag. i also manage to render my pages on google search console's fetch and render....so what can be the reason that the tool can't access my website? Also...the mobile usability report on the search console works but reports very little, and the google speed test also doesnt work... Any ideas to what is the reason and how to fix this? LEARN MOREDetailsUser agentGooglebot smartphone
Technical SEO | | Nadav_W0 -
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 -
Is there a great tool for URL mapping old to new web site?
We are implementing new design and removing some pages and adding new content. Task is to correctly map and redirect old pages that no longer exist.
Technical SEO | | KnutDSvendsen0