A technical SEO audit is a systematic examination of your website's infrastructure to identify issues that prevent search engines from crawling, indexing, and ranking your pages effectively. While content and backlinks get most of the attention, technical SEO is the foundation that makes everything else possible. Without a solid technical base, even the best content will struggle to rank.
Crawlability: Ensuring Search Engines Can Find Your Pages
Before Google can rank your pages, it must first find and crawl them. Crawlability issues are among the most common and damaging technical SEO problems. Start your audit by reviewing your robots.txt file. This file tells search engines which parts of your site they can and cannot crawl. A single misplaced disallow directive can block Google from indexing your most important pages.
Next, review your XML sitemap. The sitemap is a roadmap that tells search engines about all the pages on your site. Ensure it includes only canonical, indexable pages. Remove any pages with noindex tags, redirects, or canonical tags pointing elsewhere. Submit your sitemap to Google Search Console and monitor for errors. Check that your sitemap is referenced in your robots.txt file.
Use Google Search Console's URL Inspection tool to test individual pages. Verify that important pages are indexed and identify any crawl errors. Pay special attention to pages that should be indexed but are not — this often reveals hidden crawlability issues like JavaScript rendering problems or server connectivity issues.
Indexing: Making Sure Your Pages Appear in Search Results
Indexing is the process of adding your pages to Google's search database. Even if Google can crawl your pages, it may choose not to index them for various reasons. Check for missing or incorrect canonical tags that may be consolidating ranking signals to the wrong URL. Review meta robots tags to ensure you are not accidentally using noindex on pages you want ranked.
Duplicate content is a common indexing issue. When Google finds the same content on multiple URLs, it must choose which version to index — and it may not choose the one you prefer. Use canonical tags to specify the preferred version. Check for duplicate content caused by URL parameters, www vs non-www versions, HTTP vs HTTPS, and trailing slash inconsistencies.
Thin content pages — pages with very little valuable content — may also be excluded from indexing. Review your index coverage report in Google Search Console to identify pages that are indexed but not serving useful content. Either add substantial content or remove these pages and redirect them.
Site Architecture and Internal Linking
Site architecture is the structural foundation of your SEO strategy. A well-organised site helps search engines understand the relationship between your pages and distributes ranking authority throughout your site. Your site should follow a flat hierarchy where any important page is reachable within three clicks from the homepage.
URL structure matters for both users and search engines. Use clean, descriptive URLs that include relevant keywords. Avoid long strings of numbers and parameters. A URL like /services/web-design-johannesburg is far more useful than /page?id=42&cat=3. Implement breadcrumb navigation to reinforce site structure and provide internal links.
Internal linking is one of the most underutilised SEO strategies. Every page on your site should be linked to from at least one other relevant page. Use descriptive anchor text that includes target keywords. Link from high-authority pages to pages that need ranking help. A strong internal linking structure distributes page authority throughout your site and helps search engines discover new content.
Core Web Vitals and Page Speed Optimisation
Google's Core Web Vitals are a set of metrics that measure user experience aspects of page performance. Largest Contentful Paint (LCP) measures loading performance — the time it takes for the main content to become visible. First Input Delay (FID) measures interactivity — how quickly the page responds to user input. Cumulative Layout Shift (CLS) measures visual stability — how much the page layout shifts during loading.
Optimising these metrics requires a multi-pronged approach. Compress and properly size all images. Use modern formats like WebP and AVIF. Minimise render-blocking resources by deferring non-critical CSS and JavaScript. Enable compression with Brotli or Gzip. Implement browser caching with appropriate cache headers. Use a content delivery network to serve assets from locations closer to your users.
For South African websites, page speed is especially critical. Many users access the internet on mobile devices with slower connections and pay for data by the megabyte. A fast-loading site is not just an SEO advantage — it is a competitive necessity. Test your site using Google PageSpeed Insights, GTmetrix, and WebPageTest from multiple global locations.
Mobile Optimisation and Responsive Design
Google uses mobile-first indexing, meaning it primarily uses the mobile version of your site for ranking and indexing. If your mobile experience is poor, your rankings will suffer regardless of how good your desktop site looks. Test your site with Google's Mobile-Friendly Test and check for issues like text that is too small to read, touch elements too close together, and content wider than the screen.
Responsive design is the recommended approach for mobile optimisation. A single responsive site adapts to any screen size, maintaining a consistent user experience across devices. Avoid separate mobile subdomains or dynamic serving, which create additional maintenance complexity and potential SEO issues.
Test mobile page speed separately from desktop. Mobile networks are slower and less reliable than wired connections. Use Chrome DevTools to simulate mobile network conditions and identify performance bottlenecks specific to mobile devices. Pay attention to font sizes, button sizes, and spacing to ensure a comfortable mobile experience.
Structured Data and Rich Results
Structured data is code added to your pages that helps search engines understand the content and context of your information. Using Schema.org vocabulary, you can mark up your content to qualify for rich results — enhanced search listings that include star ratings, pricing, FAQs, event details, and more.
Start with the most relevant schema types for your business. LocalBusiness schema for location-based businesses. Product schema for e-commerce. Article schema for blog posts and news. FAQ schema for question-and-answer pages. Review schema for testimonials and reviews. Each schema type can help your listings stand out in search results with additional visual elements.
Use Google's Rich Results Test to validate your structured data implementation. Test your pages after any changes to ensure the markup remains valid. Monitor your rich results report in Google Search Console to see which pages are appearing as rich results and identify any errors or warnings.
HTTPS, Security, and Technical Foundations
HTTPS is a confirmed ranking signal and a non-negotiable requirement for modern websites. Ensure your SSL certificate is valid and properly installed. Check that all pages, resources, and assets are served over HTTPS. Mixed content warnings — where secure pages load insecure resources — can break functionality and harm user trust.
Check for redirect chains and loops. A redirect chain occurs when URL A redirects to URL B, which redirects to URL C. Each redirect adds latency and dilutes page authority. Aim for a maximum of one redirect hop between any two URLs. Use 301 permanent redirects for moved content and 302 temporary redirects only when appropriate.
Fix broken links (404 errors) throughout your site. Broken links create poor user experiences and waste crawl budget. Use tools like Screaming Frog or Ahrefs to identify broken internal and external links. Redirect broken pages to relevant alternatives or remove the links entirely.
Running Your Quarterly Technical SEO Audit
Technical SEO is not a one-time project. Google updates its algorithms constantly, your site evolves, and new issues emerge over time. Run a comprehensive technical SEO audit quarterly to catch issues before they impact your rankings. Between full audits, monitor Google Search Console for new crawl errors, manual actions, and security issues.
The businesses that stay on top of technical SEO keep investing month after month. Unlike paid advertising that stops working when you stop spending, organic traffic compounds over time. A page ranked on page one today can continue bringing leads and sales for years with proper maintenance. Combine solid technical SEO with quality content and you have one of the highest-ROI marketing channels available.
At SMK Web Design, we run this comprehensive audit for every site before launch and quarterly thereafter. We identify and fix issues before they impact performance and rankings.
About SMK Web Design
SMK Web Design is a Johannesburg-based web design agency founded by Stopher Malik. We build high-performance, SEO-optimised websites that help South African businesses attract customers, generate leads, and grow revenue. Every site we build is fast, mobile-friendly, and designed to convert visitors into customers.
Ready to build your website?
Contact us today for a free consultation and detailed quote. We will help you choose the right website structure for your business and build a site that delivers results. Get in touch with SMK Web Design to get started.