If you’re considering SEO services, the audit is where everything starts. A good audit tells you exactly where your site stands, what’s holding it back, and what to fix first. A bad one is a generic PDF full of vanity metrics and vague advice.
Here’s what a thorough SEO audit should actually cover — and why each piece matters for showing up in both traditional search and AI-generated answers.
1. Technical foundation: can search engines actually access your site?
Before anything else, crawlers like Googlebot and the crawlers behind ChatGPT, Perplexity, and Gemini need to reach, render, and index your pages. The audit should check:
- Crawlability: robots.txt, noindex tags, blocked resources, and crawl budget waste from faceted navigation or infinite parameter URLs.
- Indexation: which pages are actually indexed, which shouldn’t be, and which important pages are missing.
- Site speed and Core Web Vitals: LCP, INP, and CLS on real devices, not just lab scores.
- Mobile usability: responsive design, tap targets, and viewport configuration.
- Structured data: valid schema markup (Organization, Product, Article, FAQ, LocalBusiness) and whether it’s being picked up.
- HTTPS and security headers: mixed content, expired certs, and basic hardening.
If the technical layer is broken, nothing else gets a fair shot.
2. On-page SEO: are your pages saying the right things?
This is where relevance and intent are matched to queries. A proper review covers:
- Title tags, meta descriptions, and H1s — unique, intent-matched, and within sensible length limits.
- Header hierarchy (H1 → H2 → H3) and how it reflects the page’s topic.
- Internal linking structure, orphan pages, and anchor text distribution.
- Image optimization: alt text, file sizes, and modern formats like AVIF or WebP.
- Thin, duplicate, or cannibalized content across competing URLs.
3. Content quality and topical coverage
Modern SEO rewards sites that comprehensively cover a topic, not just one keyword. The audit should ask:
- Does each page actually answer the question it’s ranking for?
- Where are the content gaps compared to what competitors cover?
- Which pages are decaying in traffic and need refreshing?
- Is there a clear topical map (pillar pages + supporting clusters) in place?
4. Backlink profile
Links still matter as a signal of authority. Look at:
- Total referring domains and the ratio of dofollow vs. nofollow.
- Anchor text distribution — is it natural or over-optimized?
- Toxic or spammy links that may be dragging the site down.
- Competitor link gaps: where do they have links you don’t?
5. AI-search readiness
This is the piece most older audits miss. To show up in AI Overviews, ChatGPT, Perplexity, and Gemini, your content needs to be:
- Structured so machines can extract clean, citable answers — clear definitions, FAQ blocks, and explicit entity references.
- Backed by credible signals: author bios, citations, schema, and consistent NAP or About information.
- Covered across the entity’s full footprint, not just one page — sources like Reddit, YouTube, Wikipedia, and industry publications feed many AI answers.
6. Competitive and SERP analysis
You can’t plan in a vacuum. A real audit shows who you’re actually competing with for each priority query, what their content looks like, and what it would take to outrank or out-cite them.
7. A prioritized action plan
The output should be a ranked list of fixes with expected impact and effort. Quick wins (meta tags, broken internal links, missing schema) come first. Structural and content work gets sequenced over weeks or months.
What to do with the audit
Use it as a baseline and a roadmap. The value isn’t the document itself — it’s the decisions it unlocks. A good audit should leave you with clear answers to: what’s broken, what to write, what to build, and what to earn.
At RankStack, audits are the starting point of every engagement: we run the full checklist above, including the AI-readiness layer most agencies skip, and turn the findings into a focused plan for rankings and AI visibility.