25 Common Technical SEO Issues That You Need To Fix

Imagine you are notified about an issue that your website is facing. In reaction, you will have your software development team react and fix it ASAP. 

When the business is in full swing, and this happens, it is considered a technical failure rather than just an inconvenience and can be a direct threat to lead generation and brand authority. 

However, most of the time, the issue remains invisible to the naked eye. It could be a server problem or a technical SEO issue that you might be ignoring, not deliberately. Professional technical SEO services can bring more clarity to you by bringing the issues to the surface level and helping your business to get better visibility.

Right now, to provide you with a structured path toward recovery, we have segregated these 25 issues into a tiered system based on their impact on business continuity:

P1 (High): immediate threats to indexation and site access

P2 (Medium): Structural flaws affecting rankings and crawl efficiency

P3 (Low): optimization gaps that hinder long-term growth and competitive edge.

25 Technical SEO Issues

1. Accidental Noindex tags

• The Issue: This is a small piece of code in your site's header that explicitly tells Google, "Do not show this page in search results." It is the digital equivalent of locking your front door and hanging a "Closed" sign while you are still inside trying to sell products.

• Why did this happen? It usually happens during a website update. Developers often "noindex" a test site so it doesn't show up in Google during the building phase. If they forget to flip the switch back to "live" when the site goes public, the entire site stays hidden.

• How to fix it: You need to check your site's "Head" section for a tag that says content="noindex". Tools like Google Search Console will flag this under the "Excluded" report. Once found, a developer can simply delete that line of code or toggle the setting in your SEO plugin (like Yoast or RankMath). 

Category: P1 - High

2. Misconfigured Robots.txt

• The Issue: Your robots.txt file is a set of instructions for search engine "crawlers." If misconfigured, it tells Googlebot it isn't allowed to enter certain parts, or all, of your website. It’s like a security guard blocking the entrance to your store.

• Why did this happen? This is often a victim of "copy-paste" errors. A technician might try to block a private folder but accidentally types a command that blocks the entire directory. It can also happen if a security plugin becomes too aggressive in trying to save server bandwidth.

• How to fix it: Open your site's robots file by typing (yourdomain.com/robots.txt) into a browser. If you see (Disallow: /), you are blocking everything. Use the Google Robots.txt Tester to rewrite the rules so that Google is allowed to see your important content folders while still blocking private data.

Category: P1 - High

3. 4XX Broken Pages (404 Errors)

• The Issue: 

Issue 404 is an HTTP response code that appears if the server is operational, but the page or file you are searching for does not exist. This error message typically results from typos, deletions, or dead links within the website's structure. From an SEO standpoint, numerous 404 errors indicate to Google that the site is ignored, causing irreparable harm to its domain authority.  

• Why did this happen? This usually occurs when you delete an old blog post or product page, but forget that other pages (or other websites) are still linking to that specific URL. It also happens if you change the "name" of a page's URL without telling the system where to point it. It also occurs if you are not redirecting the old URL to the new one.

• How to fix it: A core part of how to do a technical SEO audit involves using a tool like SE Ranking or Ahrefs to find all your "Dead Links." Once you have the list, you must implement a "301 Redirect." This is essentially a change-of-address form that automatically sends anyone clicking the old link to a new, relevant page on your site.

Category: P1 - High

4. Missing SSL/ HTTP vs. HTTPS

• The Issue: SSL is the security technology that encrypts the connection between your site and the user. If you don't have it, browsers like Chrome will mark your site as "Not Secure" in red letters, which instantly destroys B2B buyer trust.

• Why did this happen? Most often, an SSL certificate simply expired, and the auto-renewal failed. Alternatively, a site might have moved to the secure "HTTPS" version, but some old images or scripts are still trying to load via the old "HTTP" way, causing a security warning.

• How to fix it: Contact your web host to ensure your SSL certificate is active. Then, use a tool like Why No Padlock? to find any "Mixed Content" errors. You’ll need to update every internal link to start with (https://) to ensure the green padlock icon stays visible to all users.

Category: P1 - High

5. JavaScript Rendering Issues & SPA “False 200”  Errors

• The Issue: Many modern websites utilize advanced coding (JavaScript) in their designs to give them a fancy appearance. The catch is that sometimes Google’s "eyes" are not powerful enough to "see" the content that is being kept "hidden" using such coding. Your website is like a blank white sheet of paper to Google.

• Why did this happen?
  Heavy Frameworks: Over-reliance on client-side rendering (CSR) without pre-rendering or SSR (Server-Side Rendering)
  Timeout: The crawler gives up before the JS finishes executing

• How to fix it: Use the URL inspection Tool in Google Search Console to “view rendered pages.” If the screenshot is blank or missing text, the developers need to implement “Server-Side Rendering”(SSR). This ensures the server builds the page first and hands a finished product to Google.

Category: P1 - High

6. Duplicate Content:

• The Issue: This is what happens when the same information is on multiple URLs. Google gets confused about which is the "real" page, so they decide to rank neither page, or spread your ranking power over five different pages instead of just one.

• Why did this happen? This is usually not done on purpose. It is because of what we call "technical ghosts," such as having a version of the page with "www" in the URL and another without, or having "Filter" pages, like organizing by price, which create new URLs for the same list of products.

• How can I fix it? You need to use something called a Canonical Tag. This is just a little piece of code that tells Google, "Hey, I have three versions of this page, but this is the master version."
  
  

Category: P1 - High

7. Redirect to 4XX or 5XX

• The Issue: This is a "broken bridge." You’ve told Google to go from Page A to Page B, but Page B is dead (404) or the server crashes (500) when it tries to open it. It’s like a cycle of failure, and it’s very frustrating, both for bots and humans. 

• Why did it happen? This is akin to a “housekeeping” issue. Imagine the post office forwarding all your letters to a new address, but failing only to find that your new house is torn down. After many years of updating the website, all the redirects stop functioning, and users end up getting lost on a broken page.

• How to fix it? Use Screaming Frog to crawl your "Redirects." Look for any destination that doesn’t give you a "200 OK" (Success) status. You should update those dead or 404 URLs to the working pages.

Category: P1 - High

8. AI Crawler Accessibility

• The Issue: New AI tools like ChatGPT and Perplexity "read" the internet to answer users' questions. If you block them, your business won't get cited or listed to potential client asks from any AI platform/LLM, "Who are the best B2B providers for [Your Service]?"

• Why did this happen? Many website firewalls, such as Cloudflare, automatically block AI bots to protect website data from being stolen. The intention was good, but the outcome was that your business would be hidden from the next generation of search engines.

• How to Fix it: You must check your website's robots.txt file and your firewall. Ensure you're not "disallowing" the AI bots like GPTBot or PerplexityBot. Allowing these bots ensures your business remains relevant in the AI world.

Category: P1 - High

9. Staging Site Indexation

• The Issue: "Staging Site" - This is a private playground for developers to experiment and test new things. If Google indexes it, they might end up showing your unfinished, broken, or "dummy text" version of your website to actual customers, instead of the real version.

• Why does this happen? This happens when your staging site isn't password-protected. A Google bot finds a link to your staging site (perhaps on a developer's social media or in an email) and indexes it just as if it were a normal website. The other reason for it to happen can be when you’ve not mentioned the “noindex” tag on the developer’s side.

• How to fix it: The best thing to do is to add a Password Prompt (Basic Auth) to your staging site, so only your developers have access to it. You can also add a "Noindex" tag to your entire staging domain to keep Google away while you're working on your website.

Category: P1 - High

10.  Crawl Budget Waste

• The Issue: Google has a "budget" of time it will spend on your website. If you have thousands of useless pages on your website, like tags, empty search pages, or infinite filters, Google might spend its time on those pages and never see your important pages.

• Why This Happened: This is a common problem for large B2B websites or e-commerce websites. Some websites have features like "Product Filters" that have millions of combinations. If each combination has its own URL, Google gets stuck in a maze of unimportant information.

• How to fix it: "Clean House" - Use your robots.txt file to tell Google not to visit "search" pages and "filter" pages. Use a clean XML Sitemap to tell Google which pages are important.

Category: P1 - High

11. Missing or Duplicate Meta Tags

• The Issue: "The 'title' and 'description' sections on the Google search results page. If they're missing or the same on every page, nobody will know what your page is about, and Google will have no idea how to rank it."

• Why did it happen? Most times, it’s because we didn’t pay close enough attention to the details when we were uploading our content. For instance, if we're uploading 50 service pages, we might forget to give them all different titles.

• How to fix it: If we use a tool such as Semrush's Site Audit to identify "Duplicate Meta Tags," we can go through the list and give every single page a unique and informative Title (less than 60 characters long) to let both humans and bots know exactly what's inside.

Category: P2 - Medium

12.  H1 Tag Issues

• The Issue: The H1 tag is the main heading of a page. It’s like the headline of the newspaper. If it’s missing or if you have five of them, Google gets confused about what the ‘main point’ of the page actually is.

• Why did this happen? Often, website themes are designed poorly. A designer might use an H1 tag for a small “Contact us” button or for the company logo. This tells Google that the logo is the most important “text” on the page.

• How to fix it: Every page should have exactly “one H1 tag.” Ensure it is your main keyword for that page. You can check this by right-clicking your page, selecting “Inspect”, and searching <h1>.

Category: P2 - Medium

13.  Core web vitals

• The Issue:
  This issue is related to page speed/loading speed, as well as to the overall experience of the user. How immediately does the site react when the user clicks on something on it. It overall affects the ranking of your website.

• Why did this happen? High-resolution images that are too big for the screen, or too many “third-party” scripts (like chat-bots, pop-ups, and tracking pixels) can bog down the site’s performance. High network latency, using multiple plugins that create extra scripts, are also some vital reasons.

• How to fix it: Scrape your site with the help of Screaming Frog, along with the PageSpeed API, to generate a detailed report of performance problems at the level of individual pages and compile that information in an Excel sheet. Speed up the process by adopting the use of WebP or AVIF images for the quick delivery of your website content.

Category: P2 - Medium

14. Broken Internal Links

• The Issue: These are links on your own site that point to other pages on your own site, which are not working. This is like creating a situation where the user wants to "Learn More" about your product, but hits the 404 wall.

• Why did this happen? This happens when you've changed your website. You might have changed your "Services" page to "Solutions," but 50 of your blog posts might be pointing to the "Services" page.

• How to fix it: Use a free tool like the Broken Link Checker. This tool will allow you to get a list of all the "clickable" links on your website that aren't working. You'll then need to go into those pages and manually change the link to the correct page.

Category: P2 - Medium

15.  Excessive Redirect Chains

• The Issue: A Redirect chain occurs when Page A links to Page B, and then Page B links to Page C. At this point, when it tries to connect 2 or more things again and again, Google might get confused in this scenario and may increase the crawl budget too.

• What caused this problem? This problem was caused by the "lazy" management of a site over time. Rather than fixing an old link, a programmer will add a new redirect layer over an old redirect every time a page is moved.

• How to fix this problem: You can use Screaming Frog to find the problem of "Redirect Chains." You should fix the link from Page A to directly link to Page C, effectively eliminating the middleman (Page B).

Category: P2 - Medium

16. Improper Canonicalization

• The Issue: This is where your master copy tags are incorrectly located or don't exist at all. Canonical tags basically help the search engine identify what the “master” copy is, which prevents duplication of content; not doing this will result in duplication and a bad ranking.

• Why did this happen? TThis can happen due to multiple reasons, like content duplication, URL parameters, or maybe wen SEO plug-in is incorrectly set up or when the site is moved. Anything technical-related can trigger this issue.

• How to fix it: Check your site using an SEO Browser Extension (such as SEO Quake). Make sure the "Canonical URL" matches the actual page's URL in the address bar. If they don't match, you need to adjust the settings on your CMS.

• Also, it’s good to add the self-canonicalization settings on for the domain level.

Category: P2 - Medium

17. Missing Structured Data/ Scheme Data

• The Issue: It is a coding snippet embedded into the back-end of your site that explains everything about your site to Google. It is very technical; therefore, a single error, such as forgetting to add a quote or colon, may render it nonfunctional. Resolving minor syntax errors guarantees that your site will be interpreted correctly by search engines.

• Why did this happen? Usually, when you update your website template, this code gets accidentally deleted. Sometimes, it gets "stale" – for instance, you might have said in your schema that a product is in stock, but it's really sold out.

• How to fix it: Use the Google Rich Results Test tool. It will show you what Google is seeing. If you see that your information is missing, you can use a schema generator tool to create some code and add it to your header section.

Category: P2 - Medium

18.  Mobile Usability Issues

• The Issue: This means your website is not easy to use on a phone. It might be that the buttons are too small to press with your thumbs, or the text is so small you need to zoom in to read it. Google mainly looks at the mobile version of your website when determining your ranking.

• Why did this happen? B2B websites are often created with large monitors in mind. It is easy to forget to check your website on the small screen of an iPhone when you have a complex data table or a large image.

• How can I fix it? Try using your website on your own phone. Attempt to fill out your contact form. If it is hard to do, then you have a problem. Use the "Mobile Usability" tool in Google Search Console to find specific pages where things are "too close together" or "wider than the screen."

Category: P2 - Medium

19. XML Sitemap inconsistencies

• The Issue: Your sitemap is a list of all pages you want Google to see. If there are dead pages (404s) or hidden pages (noindexed) in the list, Google will begin to distrust your sitemap and might even stop using it.

• Why does this happen? This happens if your sitemap is "static" – meaning it's made by you. As you delete pages and add new ones, your sitemap will become outdated. It can also happen if a plugin includes all images and/or "thank you" pages in the list.

• How to fix it: Use a Dynamic Sitemap plugin. This will automatically update your sitemap for you. Make sure your sitemap URL (usually domain.com/sitemap.xml) has high-quality pages you really want people to see.

Category: P2 - Medium

20. MIssing E-E-A-T Signals

• The Issue: E-E-A-T is an acronym for Experience, Expertise, Authoritativeness, and Trustworthiness. If your site appears to have been written by an unknown robot without any information on an "About Us" page or any experts listed, Google won't take what you have to say very seriously.

• Why did this happen? Many B2B businesses are humble or secretive. They publish technical blog posts without any information on who wrote the content. In an age of AI-generated spam, Google wants to see "human" elements.

• What to Do: Make sure your Author Bios are prominently displayed on your blog posts. Make sure they link to the author's LinkedIn page and display their years of experience. Make sure your "About" page is well-developed and easily accessible.

Category: P2 - Medium

21. Missing Image Alt tags

• The Issue: "Alt Tag" is the description of the picture. Since Googlebot cannot "see" the picture, it "reads" the description to understand what the picture is. It is also useful for the blind.

• Why did this happen? It is almost always the case that the person was in a hurry. They did not check the "Alt Text" box because it is not required to press "Publish."

• How to fix it: As the data shows, more than 74% of the time, the issue is not fixed. Go back through your top pages and add the "Alt Text" description of the picture (e.g., "B2B Cloud Computing Diagram").

Category: P3 - Low

22. Oversized images & bloated code

• The Issue: This is about "digital weight." If you have pictures that are 5MB each and code that is 1,000 lines longer than it needs to be, your website will feel "heavy" and slow, even if you have a fast internet connection.

• Why did this happen? Many people upload pictures from cameras or stock photo websites without first shrinking them. Many plugins also add "junk code" to your website, even if you are not utilizing the plug-in.

• How to fix it: Use TinyPNG to shrink your pictures before you upload them. To fix the code, you will want to install a plug-in called "Minification" (like WP Rocket), which essentially sucks the air out of your code files.

Category: P3 - Low

23. Orphaned Pages

• The Issue: This is a page that doesn’t have any links pointing to it from anywhere else on your site. It's an orphaned page. There are no roads to this page. Therefore, Google will not find it or consider it important.

• Why did this happen: These are old landing page ads or old blog posts that were never added to a category. This page exists on your site, but there are no roads or connections to it on your site's family tree.

• How to Fix it: There are a number of tools you can use to find these pages. Try Screaming Frog and look for "Zero In-links." Then, either delete these pages if they are useless or add a link to these pages in a relevant blog post or your "Services" menu.

Category: P3 - Low

24.  Ad density & intrusive Pop-ups

• The Issue: This refers to the "interstitial" pop-ups that cover the entire screen the moment you arrive at the page. This is considered a bad user experience by Google.

• Why did this happen? Marketers may want to collect emails as soon as possible. They may not know that this would be considered a negative experience by the user and by Google.

• How to Fix it: You can set your pop-up to "Exit Intent" - this only shows when the user tries to leave the page. You can also set your pop-up to show after 30 seconds. Ensure the "Close" button on your pop-up is large enough to be easily clicked on mobile devices.

Category: P3 - Low

25.  Noisy URL structures

• The Issue: What is a "noisy" URL? A noisy URL is a URL with random numbers and symbols. (example: site.com/p=123?ref=xyz). What is a clean URL? A clean URL lets both the visitor and Google know what's on the page. (example: site.com/technical-seo-guide).

• Why did this happen? Some older website systems were set up to automatically assign an "ID number" to every page. If you don't switch it to "Post Name" or "Friendly URLs," it can make for an ugly, unreadable URL. 

• How to fix it: Go to your CMS (like WordPress) and switch your "Permalinks" to "Post Name." Important note: If you're updating an existing URL, you'll need to set up a 301 Redirect from your old messy URL to your new clean URL, or it will break your link!

Category: P3 - Low

Most Businesses Don't Know What's Broken Until It's Too Late

Your website might have hidden issues that you missed, and those are unnoticeable for now, but they might affect you later. Knowing them is one thing, but fixing them is one of the highest priorities. The good news is you don’t need to manually dig through the code to uncover what’s broken.

• By leveraging professional SEO audit tools, you can deploy crawlers that scan your entire site and surface technical issues instantly. SEO platforms that combine crawling with keyword, backlink, and competitive data. And Google’s own tools that show you exactly how Google sees and interacts with your website.

• Third-party tools like Screaming Frog and Sitehub are crawlers. They move through your website the way a search engine bot would, page by page, and flag everything from broken links to redirect chains and duplicate content. These tools can help if you want a full technical picture of your site’s health.

• Platforms like Ahrefs and SEMrush go beyond crawling. They bring in keyword rankings, backlink profiles, and competitor data, giving you a broader view of not just what’s broken but where you stand in the market.
  But there’s a catch: these tools crawl, understand, and report differently because they are working on the surface and not through the data that is flowing between Google and your website.

How can Google Search Console be a great way to solve your Technical SEO Issues?

This tool can help you get a perspective through which you can make better changes. While third-party tools simulate a crawl, Google Search Console Pulls directly from Google’s own systems. It won’t guess or show you through a source; it will show you exactly what it is.

Here is how:

• It shows you how many pages have been indexed by Google. Not how many pages exist on your site. How many have been found by Google, crawled, and then added to their index? This is a very interesting difference.

• It shows you real crawl errors. Not how many potential errors might occur. How many actual errors have occurred? How many times has Google tried to access a page and not been able to? This is the difference between knowing a road might be closed and knowing a truck tried to drive down it this morning and hit a dead end.

• It tracks Core Web Vitals based on real user data. Screaming Frog is based on lab data. Google is based on real users and real devices. This is how Google will be making its decisions.

• It identifies indexing conflicts that may go unnoticed. Webpages that are unlinked, yet are present in robots.txt. Pages that need to be indexable yet have no index tags on them. 

• Incorrectly Aligned Canonical Tags. Such are the subtle contradictions that perplex search engines, which are highlighted directly by GSC.

• It displays how Google reads your structured data. If you have errors or if your schema markup is not being recognised, GSC tells you what pages are affected and why. No external tool does this as accurately.

Conclusion

Every issue covered in this article shares one thing in common. Left unaddressed, it quietly works against everything else you’re doing to grow your business online. Your content, adspend, social media efforts, all of it gets undermined the moment a search engine decides your website isn’t worth prioritizing. A business that is visible everywhere may have worked on the same problems and simply solved them, so that the foundation is solid.  

Technical SEO is not a one-time fix or a box you check. It is constantly evolving, and your business has to, too. If you look at a technical seo case study, you will deduce that the visibility they get is from extensive keyword research. Once you get a green light from it, you will be visible everywhere.

As search engine algorithms become more advanced and AI systems determine which sources to accept or reject, having a solid footing matters more today than it did in the past.

The issues are fixable, and the tools exist. The data is available to you from day one.