Technical SEO is the foundation everything else is built on. You can write brilliant content and earn outstanding backlinks — but if your website has fundamental technical issues, Google simply won't rank you the way you deserve. This checklist covers the technical SEO factors that matter most for Australian business websites, including the newer requirement of being readable by AI crawlers as well as by Google.
🔧 Why technical SEO matters: Google crawls billions of pages but indexes far fewer. Technical issues are the primary reason well-written, relevant content gets overlooked entirely by search engines.
1. Core Web Vitals
Google's Core Web Vitals are user experience metrics that directly influence rankings. They measure Largest Contentful Paint (LCP — how fast the main content loads), Cumulative Layout Shift (CLS — how much the page jumps as it loads), and Interaction to Next Paint (INP — how quickly the page responds to interaction). Aim for LCP under 2.5 seconds, CLS below 0.1, and INP below 200ms. Test at PageSpeed Insights.
2. Mobile-First Indexing
Google now indexes the mobile version of your site first. If your desktop site is excellent but your mobile experience is clunky or slow, your rankings suffer across all devices. Test your mobile usability at Google Search Console and fix any reported issues immediately.
3. HTTPS Security
Every page on your site must be served over HTTPS. Sites without a valid SSL certificate are marked "Not Secure" in browsers and are deprioritised in Google's rankings. Verify your SSL certificate is valid and that all HTTP URLs redirect cleanly to their HTTPS equivalents.
4. Crawlability and Indexation
Ensure Google can find and index your important pages. Check your robots.txt file isn't accidentally blocking critical URLs. Verify your XML sitemap is submitted in Search Console and contains only indexable, canonical pages. Use the URL Inspection tool to check how Google sees specific pages.
5. Site Architecture and Internal Linking
Your most important pages should be reachable from your homepage within three clicks. A logical site structure helps Google understand your content hierarchy and distributes link equity to pages that need it. Audit your internal linking to ensure important service pages receive sufficient internal links from related content.
6. Duplicate Content and Canonical Tags
Duplicate content confuses Google about which version of a page to rank. Use canonical tags to specify the preferred version of similar pages. Common issues include URL parameters, trailing slashes, and www vs non-www variants — consistent redirects handle these cleanly.
7. Structured Data and Schema Markup
Schema markup helps search engines and AI systems understand your content more precisely. For Australian businesses, the most valuable schema types are LocalBusiness, Service, FAQPage, Article with named author attribution, Review, and BreadcrumbList. Correct schema implementation can earn rich results in SERPs and significantly increases your chances of being cited in AI-generated answers.
8. AI Crawler Access and Rendering
This is the newest item on the technical checklist and the one most Australian sites have not looked at. Appearing in AI-generated answers requires that AI systems can fetch and parse your pages, and that is a separate question from whether Googlebot can.
Three things are worth checking. First, your robots.txt. If you are blocking AI crawlers, you have opted out of AI visibility, so make that a deliberate decision rather than an accidental one. The user agents worth an explicit position on include GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Google-Extended and Applebot-Extended. Note that Google-Extended controls training and grounding for Gemini but does not affect inclusion in Google Search.
Second, JavaScript rendering. Content that only appears after client-side JavaScript executes is unreliable for AI crawlers, which are generally less capable at rendering than Googlebot. If your key content is not present in the initial HTML response, treat that as a visibility risk rather than an edge case.
Third, consider an llms.txt file at your domain root. It is not an official standard and no search engine has committed to using it, so treat it as low-cost insurance rather than a ranking factor: a plain-text summary of what your business does, what you offer and where your most important pages are.
🚀 DigiWolf approach: Our technical SEO audits identify every issue holding your site back, then our team fixes them systematically. Most clients see measurable ranking improvements within 60–90 days. Book a free session to get your site audited.
📉 Related: before attributing a traffic drop to an algorithm update, rule out the technical causes above. Our piece on the August 2026 search volatility walks through that diagnostic order.
Nauman has spent more than 15 years in digital marketing across Australia, the UAE and Pakistan, working in-house and agency-side before founding DigiWolf. He holds an MBA in Finance & Marketing from the Institute of Business Administration, and works directly with every DigiWolf client on AI search, SEO and paid media strategy.