What a Technical SEO Audit Actually Covers

If your website has good content but underwhelming rankings, the problem may not be the content. It may be the infrastructure underneath it. A technical SEO audit examines the parts of your site that search engines interact with before they ever read a word of your copy.

Think of it as checking the foundations before decorating the rooms.

What a Technical SEO Audit Looks At

A proper audit spans four interconnected areas. Problems in any one of them can suppress the performance of an otherwise well-built site.

Crawlability

Before Google can rank a page, it needs to find it. Crawlability issues are anything that prevents Googlebot from discovering and reading your content.

Common problems include:

• robots.txt rules that accidentally block important pages
• Internal links that point to redirect chains instead of final destinations
• Orphan pages with no internal links pointing to them
• Crawl budget waste on low-value URLs (pagination, filter combinations, duplicate parameters)

For small sites, crawlability is rarely catastrophic, but even a single misconfigured robots.txt entry can wipe a category of pages from Google’s index entirely.

Indexation

Being crawled and being indexed are not the same thing. Google can visit a page and choose not to include it in search results. An audit examines which pages are indexed, which are excluded, and whether those decisions are intentional.

Key things to check:

• Are all important pages confirmed as indexed in Google Search Console?
• Are there canonicalisation issues causing the wrong version of a page to be indexed (www vs non-www, HTTP vs HTTPS, trailing slash vs no trailing slash)?
• Are noindex tags or HTTP headers applied correctly, and not accidentally applied to pages you want ranked?
• Are duplicate or thin pages being indexed unnecessarily, diluting the site’s overall quality signal?

Site Speed and Core Web Vitals

Page experience is a ranking signal, and Core Web Vitals are how Google measures it. The three metrics that matter are:

• LCP (Largest Contentful Paint): how quickly the main content loads
• INP (Interaction to Next Paint): how responsive the page is to user input
• CLS (Cumulative Layout Shift): how much the layout shifts during loading

Most speed issues on small business sites come from unoptimised images, render-blocking scripts, and overly large page weights. These are fixable. A site built on a modern static framework will typically pass Core Web Vitals without heroic effort. A legacy WordPress site with accumulated plugins is a different story.

Structured Data

Structured data (or schema markup) tells Google what your content is about in machine-readable terms. It does not directly affect rankings, but it enables rich results (star ratings, FAQs, sitelinks, event listings) that increase visibility and click-through rates.

An audit checks:

• Whether structured data is present and correctly implemented
• Whether it validates without errors in Google’s Rich Results Test
• Whether the schema types used match the actual content (LocalBusiness, Article, FAQPage, etc.)
• Whether there are opportunities to add schema that is missing entirely

What Happens After the Audit

An audit without a prioritised action list is just a document. The output should be a clear breakdown of issues ranked by potential impact: critical fixes first (anything blocking indexation), structural improvements second (site architecture, internal linking), and incremental gains third (schema additions, further speed improvements).

Many technical fixes are one-time tasks. Others (particularly around speed and crawl hygiene) require ongoing attention as the site grows.

If you are working with an SEO agency in Lincoln to improve your search visibility, a technical audit should be the first step. It establishes the baseline and ensures that any content or link-building work you do is not being undermined by infrastructure problems.

You can read more about the full range of SEO approaches on the SEO hub, including on-page optimisation, keyword research, and link building.