What does a site audit do?
The specific outputs a site audit produces
A well-run site audit produces several concrete outputs: a list of all pages that can't be crawled or indexed by search engines, grouped by the specific reason (blocked by robots.txt, returning a 404, marked noindex); a report of all on-page issues sorted by severity (missing titles, duplicate descriptions, empty alt text); a performance report covering Core Web Vitals scores and page load times; an internal link map showing which pages are well-connected and which are orphaned (not linked to from anywhere); and a summary of redirects, including any chains that are unnecessarily long.
What a site audit can't tell you on its own
A site audit is excellent at identifying what's technically wrong with your site. It's less useful for understanding why your competitors are ranking above you when there's nothing obviously technically wrong with your pages — that requires content gap analysis and backlink comparison, which go beyond a standard technical audit. It also can't tell you with certainty what Google will do after you fix the issues it identifies; improvements typically take weeks or months to be reflected in rankings, and the correlation between fixing a specific issue and a ranking change is often imprecise.
How to use audit results to create an action plan
The most important thing an audit does is give you a prioritised list of what to fix. Organise the findings into three tiers: blockers (issues preventing pages from being indexed or loaded at all — fix these immediately), significant improvements (issues likely suppressing rankings but not preventing indexation — fix these next), and optimisations (minor improvements unlikely to move rankings significantly on their own — fix these when you have capacity). This triage converts a potentially overwhelming list into an actionable sequence.
Key Takeaways
- A site audit produces concrete outputs: crawlability issues, on-page problems, performance scores, and internal link maps.
- Audits identify technical problems but can't predict exactly how fixing them will affect rankings.
- Triage findings into blockers, significant improvements, and minor optimisations.