Skip to content
    Moz logo Menu open Menu close
    • Products
      • Moz Pro
      • Moz Pro Home
      • Moz Local
      • Moz Local Home
      • STAT
      • Moz API
      • Moz API Home
      • Compare SEO Products
      • Moz Data
    • Free SEO Tools
      • Domain Analysis
      • Keyword Explorer
      • Link Explorer
      • Competitive Research
      • MozBar
      • More Free SEO Tools
    • Learn SEO
      • Beginner's Guide to SEO
      • SEO Learning Center
      • Moz Academy
      • MozCon
      • Webinars, Whitepapers, & Guides
    • Blog
    • Why Moz
      • Digital Marketers
      • Agency Solutions
      • Enterprise Solutions
      • Small Business Solutions
      • The Moz Story
      • New Releases
    • Log in
    • Log out
    • Products
      • Moz Pro

        Your all-in-one suite of SEO essentials.

      • Moz Local

        Raise your local SEO visibility with complete local SEO management.

      • STAT

        SERP tracking and analytics for enterprise SEO experts.

      • Moz API

        Power your SEO with our index of over 44 trillion links.

      • Compare SEO Products

        See which Moz SEO solution best meets your business needs.

      • Moz Data

        Power your SEO strategy & AI models with custom data solutions.

      Turn SEO data into actionable content briefs

      Turn SEO data into actionable content briefs

      Learn more
    • Free SEO Tools
      • Domain Analysis

        Get top competitive SEO metrics like DA, top pages and more.

      • Keyword Explorer

        Find traffic-driving keywords with our 1.25 billion+ keyword index.

      • Link Explorer

        Explore over 40 trillion links for powerful backlink data.

      • Competitive Research

        Uncover valuable insights on your organic search competitors.

      • MozBar

        See top SEO metrics for free as you browse the web.

      • More Free SEO Tools

        Explore all the free SEO tools Moz has to offer.

      Let your business shine with Listings AI

      Let your business shine with Listings AI

      Get found
    • Learn SEO
      • Beginner's Guide to SEO

        The #1 most popular introduction to SEO, trusted by millions.

      • SEO Learning Center

        Broaden your knowledge with SEO resources for all skill levels.

      • On-Demand Webinars

        Learn modern SEO best practices from industry experts.

      • How-To Guides

        Step-by-step guides to search success from the authority on SEO.

      • Moz Academy

        Upskill and get certified with on-demand courses & certifications.

      • MozCon

        Save on Early Bird tickets and join us in London or New York City

      Access 20 years of data with flexible pricing
      Moz API

      Access 20 years of data with flexible pricing

      Find your plan
    • Blog
    • Why Moz
      • Digital Marketers

        Simplify SEO tasks to save time and grow your traffic.

      • Small Business Solutions

        Uncover insights to make smarter marketing decisions in less time.

      • Agency Solutions

        Earn & keep valuable clients with unparalleled data & insights.

      • Enterprise Solutions

        Gain a competitive edge in the ever-changing world of search.

      • The Moz Story

        Moz was the first & remains the most trusted SEO company.

      • New Releases

        Get the scoop on the latest and greatest from Moz.

      Surface actionable competitive intel
      New Feature

      Surface actionable competitive intel

      Learn More
    • Log in
      • Moz Pro
      • Moz Local
      • Moz Local Dashboard
      • Moz API
      • Moz API Dashboard
      • Moz Academy
    • Avatar
      • Moz Home
      • Notifications
      • Account & Billing
      • Manage Users
      • Community Profile
      • My Q&A
      • My Videos
      • Log Out

    The Moz Q&A Forum

    • Forum
    • Questions
    • Users
    • Ask the Community

    Welcome to the Q&A Forum

    Browse the forum for helpful insights and fresh discussions about all things SEO.

    1. Home
    2. SEO Tactics
    3. Technical SEO
    4. Sudden Drop in Mobile Core Web Vitals

    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

    Technical SEO
    core web vitals google search console technical seo
    4
    5
    3335
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as question
    Log in to reply
    This topic has been deleted. Only users with question management privileges can see it.
    • rwat
      rwat Subscriber last edited by

      Web Vitals Screengrab.PNG

      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.

      1 Reply Last reply Reply Quote 0
      • Praharsh_RHTDL
        Praharsh_RHTDL last edited by

        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.

        166f3e54-485f-44f4-81a5-4e05cd49dc04-image.png

        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.

        1 Reply Last reply Reply Quote 0
        • Praharsh_RHTDL
          Praharsh_RHTDL last edited by

          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.

          3b9f9b48-74d8-4ed4-bf02-c1fefafa21e7-image.png

          2e3277d8-e620-4e4d-acbf-bcd233a16cf4-image.png

          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.

          1 Reply Last reply Reply Quote 0
          • shouryadey
            shouryadey last edited by

            @rwat Hi, did you find a solution?

            1 Reply Last reply Reply Quote 0
            • Asif_EZ
              Asif_EZ last edited by

              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.

              1 Reply Last reply Reply Quote 0
              • 1 / 1
              • First post
                Last post

              Got a burning SEO question?

              Subscribe to Moz Pro to gain full access to Q&A, answer questions, and ask your own.


              Start my free trial


              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.

              • See all categories

              Related Questions

              • mupetra

                Unsolved IP Address Indexed on Google along with Domain

                google search console aws

                My website is showing/indexed on Google search results twice, with IP address and domain name
                I'm using AWS LightSail
                I don't know how to fix this, beside I'm afraid this duplicate can harm my website

                Other SEO Tools | | mupetra
                0
              • Ravi_Rana

                Why Product pages are throwing Missing field "image" and Missing field "price" in Wordpress Woocommerce

                technical seo structured data woocommerce wordpress seo

                I have a wordpress wocommerce website where I have uploaded 100s of products but it's giving me error in GSC under merchant listing tab. When I tested it show missing field image and missing field price. I have done everything according to https://developers.google.com/search/docs/appearance/structured-data/product#merchant-listing-experiences and applied fixed i.e. images are 800x800 and price range is also there. What else can be done here?!merchant listing.jpg

                Technical SEO | | Ravi_Rana
                0
              • GoogleAlgoServant

                Unsolved Duplicate LocalBusiness Schema Markup

                schema markup schema local seo technical seo

                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 | | GoogleAlgoServant
                0
              • seoelevated

                Reducing cumulative layout shift for responsive images - core web vitals

                core web vitals

                In preparation for Core Web Vitals becoming a ranking factor in May 2021, we are making efforts to reduce our Cumulative Layout Shift (CLS) on pages where the shift is being caused by images loading. The general recommendation is to specify both height and width attributes in the html, in addition to the CSS formatting which is applied when the images load. However, this is problematic in situations where responsive images are being used with different aspect ratios for mobile vs desktop. And where a CMS is being used to manage the pages with images, where width and height may change each time new images are used, as well as aspect ratios for the mobile and desktop versions of those. So, I'm posting this inquiry here to see what kinds of approaches others are taking to reduce CLS in these situations (where responsive images are used, with differing aspect ratios for desktop and mobile, and where a CMS allows the business users to utilize any dimension of images they desire).

                Web Design | | seoelevated
                3
              • Tom3_15

                Sudden Indexation of "Index of /wp-content/uploads/"

                Hi all, I have suddenly noticed a massive jump in indexed pages. After performing a "site:" search, it was revealed that the sudden jump was due to the indexation of many pages beginning with the serp title "Index of /wp-content/uploads/" for many uploaded pieces of content & plugins. This has appeared approximately one month after switching to https. I have also noticed a decline in Bing rankings. Does anyone know what is causing/how to fix this? To be clear, these pages are **not **normal /wp-content/uploads/ but rather "index of" pages, being included in Google. Thank you.

                Technical SEO | | Tom3_15
                0
              • CarlLarson

                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 | | CarlLarson
                0
              • Gavin.Atkinson

                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.Atkinson
                1
              • poolguy

                How to Resolve Rankings Drop from a DDOS Attack?

                Our rankings just plummeted on Tuesday across the board.  There was a DDOS attack on Tuesday and since then the rankings went down and have stayed down, even though the DDOS attack has been resolved.   Also, this is the 3rd or 4th attack they've encountered this year. How long could this last?  How can we deal with this? Thanks

                Technical SEO | | poolguy
                0

              Get started with Moz Pro!

              Unlock the power of advanced SEO tools and data-driven insights.

              Start my free trial
              Products
              • Moz Pro
              • Moz Local
              • Moz API
              • Moz Data
              • STAT
              • Product Updates
              Moz Solutions
              • SMB Solutions
              • Agency Solutions
              • Enterprise Solutions
              • Digital Marketers
              Free SEO Tools
              • Domain Authority Checker
              • Link Explorer
              • Keyword Explorer
              • Competitive Research
              • Brand Authority Checker
              • Local Citation Checker
              • MozBar Extension
              • MozCast
              Resources
              • Blog
              • SEO Learning Center
              • Help Hub
              • Beginner's Guide to SEO
              • How-to Guides
              • Moz Academy
              • API Docs
              About Moz
              • About
              • Team
              • Careers
              • Contact
              Why Moz
              • Case Studies
              • Testimonials
              Get Involved
              • Become an Affiliate
              • MozCon
              • Webinars
              • Practical Marketer Series
              • MozPod
              Connect with us

              Contact the Help team

              Join our newsletter
              Moz logo
              © 2021 - 2026 SEOMoz, Inc., a Ziff Davis company. All rights reserved. Moz is a registered trademark of SEOMoz, Inc.
              • Accessibility
              • Terms of Use
              • Privacy

              Looks like your connection to Moz was lost, please wait while we try to reconnect.