Most business owners have heard of SEO. Fewer have heard of technical SEO — and those who have often assume it's something they don't need to worry about.
That assumption is expensive.
Technical SEO is the foundation that all other SEO sits on. You can write excellent content, build quality links, and have a genuinely useful site — and still struggle to rank, because Google can't properly access, understand, or trust your website.
Here's what technical SEO actually means, and what you need to care about.
What is technical SEO?
Technical SEO refers to the optimisation of your website's infrastructure — the things that affect how search engines crawl, index, and understand your site.
It's distinct from:
- On-page SEO — the content on your pages (copy, headings, keywords)
- Off-page SEO — what happens outside your site (links, mentions, reviews)
Technical SEO is everything underneath. The plumbing.
Why technical SEO matters
Google sends a bot (called Googlebot) to crawl your website and read its contents. If that bot encounters problems — pages it can't access, code it can't parse, signals that suggest a slow or untrustworthy site — your rankings suffer.
The trouble is that technical problems are invisible to humans. Your site looks fine in a browser. But Googlebot might be seeing something completely different.
The most important technical SEO factors
1. Crawlability
Can Googlebot actually reach and read your pages? Blocked pages (via robots.txt), broken links, and redirect loops can prevent Google from indexing parts of your site entirely.
What to check: Use Google Search Console's "URL Inspection" tool to see how Google sees any page on your site. If it says "URL is not on Google," something is blocking it.
2. Page speed
Google uses page speed as a direct ranking signal, and has for years. More importantly, slow pages lose visitors. Australian mobile internet speeds are moderate — a page that takes 5 seconds to load on a phone will lose a significant portion of visitors before they even see your content.
The main causes of slow sites:
- Uncompressed images (the single biggest culprit)
- Too many JavaScript files loading on every page
- Poor quality hosting
- Outdated or bloated WordPress themes and plugins
What to check: Run your site through PageSpeed Insights. The tool gives you a score and specific recommendations.
3. Mobile usability
Google's index is mobile-first — meaning it primarily uses the mobile version of your site to determine rankings. If your site works on desktop but is broken or difficult to use on a phone, that's hurting your rankings.
What to check: Use Google's Mobile-Friendly Test, or simply load your site on a phone and see whether text is readable without zooming, buttons are tappable, and content fits the screen.
4. HTTPS and security
Sites without an SSL certificate (the "S" in HTTPS) are flagged as insecure by browsers and receive a ranking disadvantage from Google. This has been a ranking signal since 2014, and yet we still regularly find business websites running on plain HTTP.
What to check: Look at your browser address bar. You should see a padlock icon. If you see "Not Secure," you need to sort this immediately.
5. Structured data (Schema markup)
Structured data is code you add to your pages that helps Google understand what your content means — not just what it says. For a local business, this includes information like your name, address, phone number, opening hours, and the type of business you are.
Getting this right can earn you rich snippets in search results — those enhanced listings with star ratings, FAQs, prices, and event dates that stand out in search results.
What to check: Use Google's Rich Results Test on your key pages.
6. Site architecture and internal linking
How your pages are structured and connected matters to Google. Pages that are buried deep in your site structure (hard to reach from the homepage) are given lower priority. Good internal linking distributes "authority" around your site and helps Google understand which pages are most important.
What to check: Can you get to every important page on your site within 3 clicks from the homepage? If not, rethink your navigation and internal links.
7. Duplicate content
If the same content appears on multiple URLs on your site, Google has to decide which version to rank — and often ranks neither. This is more common than it sounds: http:// vs https://, www. vs non-www., trailing slashes, printer-friendly pages, and filter/sort parameters on e-commerce sites can all create duplicate content issues.
What to check: Use canonical tags to signal which version of each URL is the "master" version.
8. Core Web Vitals
Core Web Vitals are a set of Google performance metrics measuring:
- LCP (Largest Contentful Paint) — how fast the main content loads
- FID/INP (Interaction to Next Paint) — how quickly the page responds to user input
- CLS (Cumulative Layout Shift) — whether elements shift around as the page loads
Passing Core Web Vitals doesn't guarantee rankings, but failing them is a handicap.
How to approach technical SEO
For most small business websites, technical SEO can be audited and resolved in a focused engagement. It's not ongoing work — it's a one-time fix that then needs periodic review.
The typical process:
- Crawl your site using a tool like Screaming Frog or Ahrefs Site Audit to identify all issues
- Prioritise by impact — fix critical issues (blocked pages, missing HTTPS, catastrophic speed problems) first
- Implement fixes — some require a developer; many can be done in your CMS
- Verify in Search Console — confirm Google is now correctly indexing the fixed pages
Most small business sites have 10–20 fixable technical issues. Most of them are straightforward once you know what to look for.
If you'd like to know exactly where your site stands technically, request a free SEO audit — we'll run a full technical check and tell you specifically what needs fixing and why.