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
      • SEO Q&A
      • 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.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      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.

      NEW Keyword Suggestions by Topic
      Moz Pro

      NEW Keyword Suggestions by Topic

      Learn more
    • 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

      Unlock flexible pricing & new endpoints
      Moz API

      Unlock flexible pricing & new endpoints

      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. Digital Marketing
    3. Paid Search Marketing
    4. 304 "If Modified Header" Triggers Error in Google Ads?

    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.

    304 "If Modified Header" Triggers Error in Google Ads?

    Paid Search Marketing
    2
    3
    2112
    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.
    • mirabile
      mirabile last edited by

      We have a client who is launch some Google Ads campaigns, and they recently asked us to fix 304 "Errors" on their website as per this feedback:

      "When we inspected the website we came across a number of 304 status errors. In order to get the ads running, we will need all of the website domain status codes converted to 200. “

      Of course, all of their website pages return a 200 Status, it's just the HTTP headers that additionally clarify with a 304 Response (not an error).

      Has anyone else ever run into this issue with Google Ads? IMHO it makes no sense to remove this functionality. Google has even recommended in the past to use this it:

      https://webmasters.googleblog.com/2008/11/date-with-googlebot-part-ii-http-status.html

      Thanks for any tips or feedback!

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

        So - we pushed back a bit because we seriously couldn't fathom why we'd need to remove all of the 304 functionality from the website due to a directive from the Google Ads team. 🙂

        Turns out, our gut instinct was right. The client's PPC agency ended up giving the Google Ads team a call, and then they learned that there was actually a 404 error happening (face palm) for one page. Not a 304.

        Leaving this post here for good measure in case this ever happens to anyone else. Watch out for typos! 🙂

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

          This means that Google believe there is an error with the landing pages which you have entered for your ads. 9 times out of 10, this comes down to someone putting the wrong URL into the Google Ads back-end and then having issues. This is especially the case for 3XX errors which usually indicate that redirects are at play. In your case, the story seems to be a bit different

          Google is telling you that when they visit your landing URLs for your ads, instead of the ad connecting straight to the page, Google gets redirected:

          https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/304##targetText=The%20HTTP%20304%20Not%20Modified,redirection%20to%20a%20cached%20resource.

          "The HTTP **304 Not Modified** client redirection response code indicates that there is no need to retransmit the requested resources. It is an implicit redirection to a cached resource."

          So basically, Google cannot load your landing page because they are being redirected to a cache of the landing page instead of the live URL. This is unlikely to be down to someone entering the URL incorrectly in Google Ads (as that would be more likely to spawn a 301, 302 or 307). If you keep serving Google a cached version of your landing page, they can't know what's underneath of that redirect. As such, they can't trust the contents of the web-page

          Some unscrupulous marketers, might use a 304 to get Google to evaluate a fake landing page, then send actual users to a completely different landing page (other than the one which Google evaluated). My guess is, this is a vulnerability which Google are unwilling to tolerate on their ads platform

          1 Reply Last reply Reply Quote 1
          • 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

          • Fubra

            PPC: how to get rid of an ad appearing on a keyword we don't want?

            Hi, Our ad on Google Ads is appearing for a search we don't want. it isn't in our search keywords and when i try and ad it to our negative ones, we get the error " You cannot exclude keywords that are targeted " which i assume means that google thinks we are bidding on it? We have a selection of broad phrase matches so i can only think that this is where it's coming from? Do you have any tips on tracking down which keyword is generating this ad and how we can turn it off? (we don't want to pay for clicks on this search if possible!) Btw - i have turned off each keyword in turn to test it = nothing. have then paused the whole campaign = gets rid of the ad (but this is our most successful campaign so i can't just turn it off). Any advice super super welcome. thank you!

            Paid Search Marketing | | Fubra
            1
          • Chris661

            Can Google Shopping Ads Lower Ranking due to Bounce?

            I am noticing Google Shopping Ads are showing up for really irrelevant keywords on some of my products. This quite predictably causes a high bounce rate when a user comes from these ads. There is very little control over what Google Ads seems to decide are relevant keywords from what I can see. Only control is by viewing search terms and setting as negative keywords, but his doesn't help much. Negative keywords are often ignored or they come up with some other really irrelevant new keyword. Seems this high bounce rate could hurt ranking? Any experiences shared with Google Shopping ads appreciated!

            Paid Search Marketing | | Chris661
            1
          • vgusvg

            301 Redirects and Google Shopping Feeds

            I am moving my site from Volusion to Shopify.  The domain remains the same but the URL paths are different.  With respect to my Google Shopping feed, is it best to send old URLs (with 301 redirects) or to send the new URLs?

            Paid Search Marketing | | vgusvg
            0
          • EvansHunt

            Changing Domains - Will a 301 redirect be looked unfavourably for my Ads?

            Hey All, So over the next few weeks we are switching over a clients domain to a new one. Each of the old pages on the old domain will have a 301 redirect to it's new contextual page (with the same content). My question is this, we currently have multiple PPC campaigns running for this client and the ads are pointed towards the old domain so the ads will redirect over to the new domain. My question is this, will Adwords look at this redirection unfavourably? If so, then I will have to duplicate each ad (100's of ads) with a new destination URL (since if I edit the current ads they will lose all past performance history).  Obviously for branding I'm going to have to probably change the display URL eventually but for now I'm looking at the BIG issues that could occur. I would normally call Google and ask this question but I don't want them to flag anything in my account just in case this is looked unfavourably. Thanks! Jon

            Paid Search Marketing | | EvansHunt
            0
          • DoMiSoL

            Best practice to separate paid from organic conversions in Google Analytics

            I have a PPC campaign for a client with standalone landing pages with a form, not reachable from the website (although in the same domain). I've added the AdWords conversion code to the "thank you" page and I also added a Goal in
            Google Analytics whose counter is increased every time the thank you page is reached. This way I can track conversions with both AdWords and Analytics. Is that correct? Should I import back in AdWords the goals from Analytics, as suggested in the AdWords account? I have another landing page with a form in the website, where I send users coming from
            organic search, so I set up a second goal in Analytics for the thank you page of this form. Is this the reason why  I am supposed to import in AdWords the analytics' goals, so that I could see both kind of conversions in both accounts? But the most important question is:  If I send both PPC/organic visitors to the same landing page is there still a way to separate PPC from Organic conversions? Thank you very much for your advice. DoMiSoL Rossini

            Paid Search Marketing | | DoMiSoL
            0
          • bricktech

            Google Analytics and WorldPay - Tracking Sales/Conversions

            Hi there, I recently remember reading somewhere that tracking code could be used to monitor sales/conversions of eCommerce payments that went through WorldPay. I've been looking around the web for news stories, forums, discussions, but all seem to be from 2007 - 2011; was just wondering if anyone knew any up-to-date info they could point me towards? Thanks

            Paid Search Marketing | | bricktech
            0
          • Reis_Inc.

            Can I dynamically add city name to my PPC ad text and URL based on the user's search?

            I have looked into DKI (Dynamic Keyword Insertion), but have not found a solution and thought that some excellent Mozzer might be able to help.  Here is the idea: We have landing pages for hundreds of cities.  The local content on each of these cities changes page to page, however the keywords that we are going after are the same.  So, I am trying to create a dynamic ad group that looks something like this: Headline: {City Name} {Keyword} Description: We cover {City Name} {Keyword}, get more info now! URL: http://www.website.com/{City Name} Please let me know if you can assist with this, B

            Paid Search Marketing | | Reis_Inc.
            0
          • YESdesign

            What is a good CTR for a Google AdWords Remarketing banner campaign?

            Hello there, given that in the banners we offer a promotion with "some bonus if you sign up", what is from your experience a good CTR for a Google AdWords Remarketing banner campaign? Many thanks to everyone that answers. YESdesign

            Paid Search Marketing | | YESdesign
            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
          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 - 2025 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.