What a website audit actually covers
People use "website audit" to mean three overlapping things: a technical SEO check, a performance check, and increasingly an AI-visibility check. Run them separately and you get three partial pictures. Run them together and you see how they interact, because they do. A page that renders slowly gets crawled less. A page with broken structured data both loses rich results and drops out of AI citations.
A complete website audit inspects five layers.
| Layer | What it checks | Why it matters |
|---|---|---|
| Crawlability | Robots rules, sitemaps, internal links, redirect chains | Google discovers most URLs through internal links and sitemaps; weak architecture slows everything |
| Indexing | Canonicals, duplicate content, noindex, HTTPS enforcement | A blocked or canonically confused page struggles to appear even if it is useful |
| On-page SEO | Titles, meta descriptions, headings, content depth, internal linking | Determines relevance and how clearly a page answers a query |
| Performance | Core Web Vitals (LCP, INP, CLS) from real-user field data | Slow pages hurt rankings and conversions |
| AI answer readiness | Schema, answer-first structure, freshness, citable facts | Structured data is now how AI systems decide what to cite, not just how Google renders rich results |
Performance: measure the field, not the lab
Core Web Vitals has three thresholds Google rewards, measured at the 75th percentile of real Chrome users over a rolling 28-day window:
LCP (Largest Contentful Paint) under 2.5 seconds
INP (Interaction to Next Paint) under 200 milliseconds
CLS (Cumulative Layout Shift) under 0.1
The single most common audit mistake is treating a Lighthouse score as a ranking signal. Lighthouse runs one page in a controlled lab. Google ranks on CrUX field data, which captures real devices and networks. Use Lighthouse to debug a specific page, but judge your site by field data in Search Console.
The AEO layer most audits still skip
Traditional SEO gets you into the top 10. AEO (answer engine optimization) gets you cited inside AI Overviews, ChatGPT, Perplexity, and Claude answers. These overlap but are not identical.
Roughly 38% of AI Overview citations come from pages already in the top 10, so ranking still matters, but the rest increasingly pulls from authoritative niche sources.
For commercial and evaluation-stage queries, around 83% of AI citations came from pages updated within the past 12 months, and more than 60% were refreshed within six months.
Pages not refreshed roughly every quarter are about 3x more likely to lose AI citations.
Practically, that means your audit should check whether each important page has a clear answer near the top, clean structured data, and a recent, honest update date. Most audit tools built before 2024 do not look at any of this.
How to run a website audit
Pull field data first. Open Google Search Console. Check index coverage, Core Web Vitals, and mobile usability from Google's own perspective.
Crawl the site. Look for broken links, redirect chains, duplicate titles, missing meta descriptions, and orphan pages.
Check indexing logic. Confirm HTTPS is enforced sitewide with no mixed-content warnings and that canonicals point where you intend.
Validate structured data. Broken schema quietly kills both rich results and AI citations.
Score AI readiness. Does each priority page answer its query in the first paragraph? Is it fresh? Is it citable?
Prioritize. Sort every finding by impact and effort. A 90-item list with no priority is less useful than 12 fixes ranked by what moves revenue.
Audit cadence
Run a full audit at least every six months, and always immediately before and after any migration, CMS upgrade, or domain change. Between full audits, monitor crawl stats, Core Web Vitals, and index coverage monthly so regressions surface early instead of six months late.
FAQ
How is a website audit different from an SEO audit?
An SEO audit focuses on search rankings. A website audit is broader: it folds in performance and, increasingly, AI answer readiness alongside SEO, because those layers affect each other.
How long does a website audit take?
A manual full audit takes a specialist several hours to a day. Automated tools produce a first-pass report in minutes; you then spend your time on prioritization and fixes rather than data gathering.
How often should I audit my website?
Full audit every six months, plus before and after any major change. Light monitoring of Core Web Vitals and index coverage should run continuously.
Do I need paid tools?
No, to start. Google Search Console and PageSpeed Insights are free and authoritative. Paid or dedicated tools save time and add the AEO checks that free Google tools do not cover.
Does site speed really affect rankings?
Yes, but through real-user field data, not lab scores. LCP under 2.5s, INP under 200ms, and CLS under 0.1 at the 75th percentile are the thresholds Google rewards.
Can a website audit help me show up in ChatGPT or AI Overviews?
Yes. Auditing structured data, answer-first formatting, and content freshness directly improves your odds of being cited, since AI engines favor fresh, well-structured, authoritative pages.
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