You can write the best content in the world, but if your website has technical SEO problems, Google won't rank it. Technical SEO is the foundation that everything else is built on. In this guide, I'll cover the most critical technical issues I find in almost every website audit — and exactly how to fix them.
What Is Technical SEO?
Technical SEO refers to optimizations that help search engines crawl, index, and understand your website more effectively. It has nothing to do with the words on your page — it's about the structure, speed, and health of your site behind the scenes.
"A technically broken website is like a shop with a locked door. Your products might be amazing, but no one can get in to see them."
1. Website Crawlability
Before Google can rank your pages, it needs to crawl them. Crawlability issues happen when Googlebot can't access certain pages due to robots.txt restrictions, noindex tags, or broken internal links. Use Google Search Console to check your coverage report and identify any pages that are blocked or returning errors.
Go to Google Search Console → Coverage → look for pages marked as "Excluded" or "Error." These are the pages Google can't properly access.
2. Site Speed and Core Web Vitals
Page speed is a confirmed Google ranking factor. In 2026, Google measures speed through Core Web Vitals — three specific metrics: Largest Contentful Paint (how fast the main content loads), First Input Delay (how quickly the page responds to interaction), and Cumulative Layout Shift (how stable the layout is as it loads).
Run your website through Google PageSpeed Insights or GTmetrix to see your current scores. Common speed fixes include compressing images, enabling browser caching, minifying CSS and JavaScript, and using a Content Delivery Network (CDN).
3. Mobile-Friendliness
Google uses mobile-first indexing, which means it primarily uses the mobile version of your website for ranking. If your site doesn't work well on phones, your rankings will suffer — regardless of how good it looks on desktop. Test your site with Google's Mobile-Friendly Test tool and fix any issues it flags.
4. HTTPS Security
If your website is still on HTTP instead of HTTPS, you're losing trust signals and likely rankings. Google has used HTTPS as a ranking factor since 2014, and browsers now display "Not Secure" warnings for HTTP sites. Make sure your SSL certificate is active and properly installed.
5. XML Sitemap
An XML sitemap tells Google which pages exist on your website and when they were last updated. Every website should have one and submit it through Google Search Console. Make sure your sitemap only includes pages you want indexed — don't include redirect pages, duplicate pages, or pages with noindex tags.
6. Structured Data (Schema Markup)
Structured data is code you add to your pages to help Google understand your content more specifically. For a portfolio website like mine, adding Person schema and LocalBusiness schema can help Google display richer results in search — including your name, location, and services. Use Google's Rich Results Test to check if your structured data is working correctly.
7. Duplicate Content
Duplicate content confuses Google — if the same content exists on multiple URLs, Google doesn't know which version to rank. Use canonical tags to tell Google which version of a page is the "official" one. Also check for www vs non-www and HTTP vs HTTPS duplicates and make sure they all redirect to a single preferred URL.
8. Broken Links
Broken internal links waste your crawl budget and create a poor user experience. Use Screaming Frog or Ahrefs Site Audit to scan for broken links and fix them by either updating the link destination or setting up proper 301 redirects.
Run a full technical SEO audit every 3 months. Websites change constantly — new pages get added, old pages get deleted, and technical issues appear over time without anyone noticing.
Final Thoughts
Technical SEO isn't glamorous, but it's the difference between a website that grows and one that stays stuck. Fix the foundation first, then invest in content and links. If you're not sure where to start, a professional SEO audit will give you a clear picture of what needs to be fixed and in what order.
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I'll identify every technical issue holding your website back and give you a step-by-step fix plan.
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