How to Conduct a Technical SEO Site Audit
What a Technical SEO Audit Is For
A technical SEO audit examines whether search engines can efficiently discover, crawl, render, index and understand your website, and whether the experience it delivers meets the standard search engines reward. It is deliberately separate from content and link work. You can publish excellent content and earn strong links while a single misconfigured directive prevents any of it from being indexed.
Audits matter most at three moments: before a major investment in content or links, after a redesign or migration, and whenever organic traffic declines without an obvious content explanation. Running one annually as a baseline is sensible practice for any site of meaningful size.
How AAMAX.CO Approaches Technical SEO Audits
At AAMAX.CO we are a full service digital marketing company providing web development, digital marketing and SEO services worldwide, which gives our audits an unusual advantage: the team that finds the problems can also fix them. Many audits end as a spreadsheet nobody implements because the recommendations require engineering capacity the client does not have. Our SEO services combine crawl analysis, log file review, Core Web Vitals engineering and structured data implementation with the development resource to deploy the changes. If you want an audit that ends in shipped fixes and measurable recovery rather than a document, hire AAMAX.CO.
Step One: Establish a Baseline
Before touching anything, record where you stand. Export organic sessions, conversions and revenue for the last twelve months, capture Search Console impressions, clicks and average position, note the number of valid indexed pages, and record current Core Web Vitals field data. Save your existing rankings for priority keywords.
Without a baseline you cannot demonstrate impact, and you cannot distinguish a problem your audit created from one it solved. Take dated screenshots and keep the exports.
Step Two: Crawl the Site Properly
Run a full crawl with a dedicated crawler, configured to render JavaScript so you see what a modern crawler sees rather than just the raw HTML. Crawl from your canonical homepage and let it complete rather than sampling, unless the site is enormous.
Then compare three page counts: URLs found by your crawl, URLs listed in your XML sitemap, and URLs reported as indexed in Search Console. Significant discrepancies between these three numbers are your most productive starting point. More crawled than indexed suggests quality or duplication problems. More in the sitemap than crawlable suggests orphaned pages with no internal links. More indexed than expected suggests parameter or duplicate URL bloat.
Step Three: Audit Crawlability and Indexation Directives
Read your robots.txt line by line and confirm nothing important is disallowed. A single overly broad rule can remove entire sections from search. Verify the sitemap directive is present and correct.
Next examine meta robots tags and X-Robots-Tag headers across the crawl. Look for noindex on pages that should rank, which is a surprisingly common leftover from staging environments. Check canonical tags: every indexable page should canonicalise to itself unless it is a genuine duplicate, canonicals should point to live 200 status URLs, and they should not form chains or loops. Review pagination handling and faceted navigation, which are the usual sources of crawl budget waste on larger sites.
Step Four: Review Status Codes and Redirects
Catalogue every non 200 response. Internal links pointing to 404 pages waste crawl budget and frustrate users, so fix the links rather than just redirecting the destinations. Server errors in the 500 range are urgent because repeated failures cause crawlers to back off.
Flatten redirect chains so every redirect resolves in a single hop, and make sure permanent moves use 301 or 308 rather than 302, since temporary codes signal that the original URL should be retained. Confirm that HTTP redirects to HTTPS, that non canonical hostname variants redirect to the canonical one, and that trailing slash handling is consistent.
Step Five: Assess Site Architecture and Internal Linking
Measure click depth for your most important pages. Anything beyond three or four clicks from the homepage receives less link equity and is crawled less often. Identify orphan pages with no internal links at all, since they are effectively invisible except through the sitemap.
Look at how internal links distribute authority. Are your commercial pages actually receiving links from your best performing content, or is equity pooling in a blog archive nobody converts on? Restructuring internal links is one of the cheapest, highest impact changes available in most audits because it requires no new content and no new links.
Step Six: Evaluate Performance and Core Web Vitals
Use field data from Search Console and the Chrome user experience report rather than relying solely on lab tests, because real user data reflects real devices and networks. Assess Largest Contentful Paint, Interaction to Next Paint and Cumulative Layout Shift separately for mobile and desktop.
Common culprits are unoptimised hero images, render blocking scripts and stylesheets, missing width and height attributes causing layout shift, heavy third party tags, and fonts loading without a sensible display strategy. Prioritise fixes on your highest traffic templates rather than chasing a perfect score on a page nobody visits.
Step Seven: Check Mobile, Rendering and Structured Data
Confirm the mobile experience contains the same primary content and links as desktop, since mobile is what gets indexed. Test key templates with a rendering tool to verify that content injected by JavaScript is actually present in the rendered output.
Validate structured data for the schema types relevant to your business and fix errors that prevent rich results. Also review title tags and meta descriptions at scale for duplicates, truncation and missing values, and confirm heading hierarchy is logical with one clear primary heading per page.
Step Eight: Prioritise and Deliver an Action Plan
An audit's value lies entirely in prioritisation. Score every finding on likely traffic impact against implementation effort, then group into three tiers: critical issues blocking indexation or breaking pages, high impact improvements to performance and internal linking, and housekeeping refinements.
Assign an owner and a target date to each item, specify exactly what change is required in language a developer can act on, and define how you will verify the fix. Then re crawl after deployment to confirm the issue is genuinely resolved and monitor your baseline metrics over the following weeks. Feeding these results back into your wider digital marketing reporting keeps technical work visibly connected to commercial outcomes.
Final Thoughts
A technical SEO audit is a systematic investigation, not a plugin score. Crawl thoroughly, compare your crawl against sitemap and index data, verify directives, clean up status codes, strengthen architecture, fix performance and then prioritise ruthlessly. Done properly it frequently unlocks growth that content and link investment alone could never reach, and our team is ready to run one for you.
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