Creating high-quality content is only one part of SEO success. Technical SEO is the foundation of organic search performance that makes sure search engines can efficiently crawl, index, and understand your website.
Without that foundation, even your best pages can struggle to rank.
Many technical SEO issues are easy to overlook, but they can directly impact your website’s visibility. Resolving them creates a stronger foundation for better rankings and long-term organic growth.
In this guide, we’ll cover 15 common technical SEO issues that can hurt rankings and explain how to fix them.
15 Technical SEO Issues That Hurt Rankings
Technical SEO issues aren’t always obvious. Some require a deeper technical audit, but the other are commonly identifiable and easy to fix.
Below are 15 of the most common technical SEO issues you need to instantly check:
1. Slow Page Speed and Poor Core Web Vitals
Page speed is an important ranking factor because it directly affects both user experience and search performance. Slow-loading pages can increase bounce rates and reduce engagement. Poor page performance can also reduce crawl efficiency.
Google uses Core Web Vitals to measure page experience. These include:
- Largest Contentful Paint (LCP) for loading performance
- Interaction to Next Paint (INP) for responsiveness, and
- Cumulative Layout Shift (CLS) for visual stability.
How to Fix It
Improve page speed by implementing these best practices:
- Compress and properly size images before uploading them.
- Minify CSS and JavaScript files to reduce unnecessary code.
- Enable browser caching for faster repeat visits.
- Remove unused CSS and JavaScript that slows page rendering.
- Improve server response times by optimizing your hosting and backend.
- Use a Content Delivery Network (CDN) to deliver content faster to users across different locations.
2. Broken Internal and External Links
Broken links point to pages that no longer exist or can’t be accessed, often resulting in 404 errors. They interrupt the user journey, make your website appear outdated, and prevent visitors from reaching the information they’re looking for.
From an SEO perspective, broken links can waste crawl budget when search engines spend time crawling inaccessible URLs. Broken internal links also disrupt the flow of authority across your website.
How to Fix It
- Audit your website regularly to identify broken internal and external links.
- Update or replace outdated URLs with relevant, working pages.
- Use 301 redirects when directing removed pages to relevant alternatives.
- Review your internal linking structure to keep important pages easily accessible.
3. Duplicate Content
Duplicate content occurs when the same or very similar content is available through multiple URLs, often due to URL parameters, printer-friendly pages, or HTTP and HTTPS versions of a website. This can confuse search engines about which version to rank, diluting ranking signals and reducing the visibility of the preferred page.
How to Fix It
- Use canonical tags to tell search engines which page to prioritize.
- Consolidate duplicate or near-identical pages where possible.
- Implement 301 redirects to the primary URL.
- Manage URL parameters to avoid creating duplicate pages.
4. Missing or Incorrect Canonical Tags
Canonical tags indicate the preferred URL among duplicate or similar pages. When they’re missing, point to the wrong URL, conflict with other canonical signals, or are implemented incorrectly, search engines may consolidate ranking signals to the wrong page or index an unintended version instead.
How to Fix It
Here’s how to implement them consistently across your website:
- Add self-referencing canonical tags to important pages.
- Point duplicate pages to the preferred URL.
- Audit canonical tags regularly to identify incorrect or conflicting implementations.
5. Crawl Errors Preventing Search Engine Access
Crawl errors occur when search engines can’t access a page on your website. Common crawl errors include 404 (page not found), 5xx server errors, and DNS errors. When important pages can’t be crawled, they can’t be indexed or ranked, limiting their visibility in search results.
How to Fix It
- Monitor crawl reports in Google Search Console.
- Resolve server and DNS issues promptly.
- Fix broken URLs or redirect them where appropriate.
- Make sure important pages return a 200 OK status.
6. Pages Blocked from Crawling or Indexing
Search engines can only rank pages they can crawl and index. However, misconfigured technical settings like incorrect robots.txt rules, noindex tags, or overly broad Disallow directives can accidentally block valuable pages from appearing in search results.
How to Fix It
- Audit your robots.txt file regularly.
- Review meta robots directives across important pages.
- Remove unnecessary noindex tags.
- Test blocked URLs to ensure they can be crawled and indexed as intended.
7. Poor Internal Linking Structure
Internal links help search engines discover pages, understand the relationship between them, and distribute authority across your website. A poor internal linking structure can create orphan pages, weaken topical relationships, and make it harder for important pages to rank.
How to Fix It
Strengthen your internal linking strategy by following these best practices:
- Build contextual internal links between related pages.
- Connect content through topic clusters.
- Identify and link orphan pages.
- Improve your website’s navigation hierarchy.
8. Thin or Low-Value Pages Being Indexed
Not every page on your website provides value to users or search engines. When thin content, near-empty pages, tag pages, filter pages, and outdated archives are indexed, they can dilute your site’s overall quality and make it harder for search engines to identify your most valuable content.
How to Fix It
Focus your crawl budget and ranking signals on pages that provide genuine value.
- Improve thin pages with more valuable content.
- Consolidate overlapping or similar pages.
- Add noindex to low-value pages that don’t need to appear in search results.
- Remove unnecessary URLs from your website.
9. Poor Website Architecture
A poorly organized website makes it harder for both users and search engines to find important pages. Deep page structures, complex navigation, and an unclear content hierarchy can reduce discoverability and make crawling less efficient.
How to Fix It
- Create a logical site hierarchy of defined categories and subcategories.
- Reduce click depth for important pages.
- Organize related content into topic clusters to strengthen topical relevance.
- Keep your navigation simple and intuitive for users.
10. Missing or Incorrect XML Sitemap
An XML sitemap helps search engines discover the important pages on your website. However, outdated sitemaps that include redirected, broken, or non-indexable pages can reduce crawl efficiency. Ideally, your sitemap should contain only the pages you want search engines to crawl and index.
How to Fix It
- Generate a sitemap that reflects your current website structure.
- Include only indexable pages.
- Remove redirected, broken, and non-indexable URLs.
- Submit the updated sitemap to Google Search Console.
11. Incorrect Redirect Implementation
Redirects help users and search engines reach the correct page when a URL changes. However, redirect chains, redirect loops, excessive redirects, and using temporary redirects for permanent URL changes can slow crawling, reduce page performance, and affect search visibility.
How to Fix It
- Replace redirect chains with a single direct redirect to the final destination.
- Use 301 redirects for permanent URL changes.
- Remove unnecessary redirect hops.
- Audit your redirect rules regularly.
12. Mobile Usability Issues
Google primarily uses the mobile version of a website for indexing and ranking. Poor mobile layouts, unreadable text, closely spaced clickable elements, and unresponsive designs can create a poor user experience and negatively impact search performance.
How to Fix It
Make mobile usability a priority by following these best practices:
- Use a responsive design that adapts to different screen sizes.
- Optimize font sizes for mobile devices.
- Improve spacing between clickable elements.
- Test mobile usability regularly across different devices.
13. Missing Structured Data
Structured data, or schema markup, helps search engines better understand your content and its context. While it isn’t a direct ranking factor, it can improve content interpretation and make your pages eligible for rich results, helping them stand out in search.
How to Fix It
- Add appropriate schema types, such as Article, Product, FAQ, or Breadcrumb.
- Validate your structured data to identify errors.
- Keep schema markup updated as your content changes.
- Prioritize pages that can benefit from rich results and enhanced search visibility.
14. Poor JavaScript Rendering
JavaScript-powered websites can create SEO challenges when important content isn’t rendered properly for search engines. Rendering delays, client-side rendering, and JavaScript-dependent content can prevent crawlers from accessing important page elements, limiting their ability to crawl, index, and rank your pages.
How to Fix It
- Test the rendered HTML to confirm important content is visible.
- Use server-side rendering (SSR) or hybrid rendering where appropriate.
- Make sure critical content, links, and metadata are crawlable without relying entirely on JavaScript.
- Optimize JavaScript execution to reduce rendering delays.
15. HTTPS and Security Issues
HTTPS secures the connection between your website and its visitors, making it an important ranking signal. Issues such as mixed content, expired SSL certificates, or pages that still load over HTTP can trigger security warnings, reduce user trust, and impact your website’s search performance.
How to Fix It
Maintain a secure website by following these best practices:
- Install and maintain a valid SSL certificate.
- Redirect all HTTP pages to HTTPS.
- Eliminate mixed content across your website.
- Monitor your website regularly for security issues.
Conclusion
Technical SEO is not a one-off task from a checklist. It demands regular monitoring and maintenance because technical issues can develop anytime and ultimately affect how search engines crawl, index, and rank your pages.
Regular technical audits help identify and fix these issues before they impact your rankings. Better crawlability, indexability, and user experience all contribute to stronger search performance and give your content the best chance to rank.
When combined with high-quality content and a strong authority-building strategy, a technically sound website creates a stronger foundation for sustainable organic growth.
Need help building your search visibility strategy? Reach out to us.
