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An SEO audit is the fastest way to find out why a website is not ranking – and what to fix first. This guide explains what an audit is, exactly what it checks, how to run one yourself, and when to bring in a specialist.
What is an SEO audit?
A structured review of everything Google uses to decide whether a page deserves to rank: whether it can be crawled and indexed, whether its content matches search intent, whether its metadata earns clicks, whether internal links give it context, and whether it loads fast enough. A useful audit does more than list problems – it ranks them by impact so you fix the few things that actually move traffic.
What an SEO audit checks
Six areas, in priority order.
Technical foundation
Crawlability, indexation, canonicals, robots directives, redirect chains, broken links, HTTPS and structured data. If Google cannot index a page, nothing else matters.
On-page signals
Titles, meta descriptions, heading hierarchy, keyword usage, content depth and image alt text. See the on-page SEO audit guide.
Content and intent
Does the page match the dominant intent of the query? Is it deep enough to answer fully? Does it have a clear next step? Content that misses intent rarely ranks.
Internal links
Every important page should be reachable within a few clicks and receive contextual links from related pages. Orphan pages rank poorly even when indexed.
Speed and Core Web Vitals
LCP, CLS and INP are measured on real user data. Slow pages lose conversions and crawl budget. See technical SEO sprints if speed is the bottleneck.
AI search readiness
An audit in 2026 should also check whether AI systems can read and cite your content: clean semantic HTML, FAQ coverage, structured answers, and whether AI crawlers are allowed in robots.txt.
How to run an SEO audit
Step by step, in the order that avoids wasted work.
Check indexability first
Confirm key pages return 200, are not accidentally noindexed, and have one self-referencing canonical.
Fix titles and meta descriptions
They decide clicks at the same ranking position. Make every one unique and compelling.
Match search intent
Compare your page against what already ranks for the query.
Deepen thin content
Most ranking pages on a topic have 600+ words and clear H2 structure.
Add internal links
Link from related pages using descriptive anchors.
Fix Core Web Vitals
LCP, CLS and INP – and compress images.
Validate structured data
Add FAQ schema where you answer questions.
Re-audit after changes
Compare against your own Search Console history.
Free SEO audit vs paid SEO audit
| Free tool | Paid audit | |
|---|---|---|
| Where the leaks are | Yes | Yes |
| Priority order by impact | Basic | Detailed |
| Search Console data | Not included | Included |
| Implementation in your CMS | No | Yes |
| Cost | $0 | From $49 |
A free checker is right for diagnosis. A paid audit adds interpretation and execution – which pages matter commercially, the order to fix them, and someone to implement the changes.
How much does an SEO audit cost?
Automated
One-time professional scans.
Freelance manual
A person reviews the site and prioritises.
Agency
Mid-size sites, audit plus implementation.
Enterprise audits exceed $15,000. GSA offers a fixed-scope Search Console audit from $49 and a focused SEO audit service with implementation.
How often should you run an SEO audit?
What an SEO audit is not
How to prioritise what to fix
Work in this order – it avoids wasted effort.
The three layers of an audit
An audit is really three audits in one.
Common SEO audit mistakes
- Running the audit once and never again. Regressions are cheaper to catch early – scan monthly.
- Fixing cosmetics before indexability. A beautiful page Google cannot index is worth nothing.
- Chasing every warning. Fix the high-impact few, then re-audit.
- Ignoring Search Console. Crawl data tells you what is broken; query data tells you what matters.
- No owner or deadline on each fix. An audit without execution is a hobby.
Related guides
- SEO audit checklist (40 checks) – the practical companion.
- On-page SEO audit – titles, headings, content, links.
- Technical SEO audit – crawl, index, speed, schema.
- Free website SEO audit – run one in 30 seconds.
- SEO audit services – when you want the fixes done.
How to run a free SEO audit (in five minutes)
Run the scan
Enter your URL in the free audit. It samples up to five pages and returns a verdict with the top moves.
Read the biggest leak
The tool names the single issue costing you most. Start there, not with the longest list.
Cross-check Search Console
Filter queries by impressions with zero clicks – those are title and intent fixes.
Work the checklist
Use the 40-point checklist for the checks a scan cannot see.
Fix, then re-scan
Fix blockers first, then re-run the scan to confirm the change landed.
What to do after the audit
- Turn findings into a dated plan with an owner for each fix – an audit without execution changes nothing.
- Fix in impact order: indexability, then titles and intent, then depth and internal links.
- Re-audit monthly and compare against the previous scan, so you catch regressions early.
- Add internal links to pages you have just fixed, so the improvements compound.
- Scale the work with a fixed-scope SEO audit service when the list is longer than your time.
Free vs paid SEO audit tools
Frequently asked questions
What is the difference between an SEO audit and an SEO check?
Can I do an SEO audit myself?
Do free SEO audits work?
Will an SEO audit improve my rankings?
How long does an SEO audit take?
What should I fix first?
How much does an SEO audit cost?
Do I need a paid audit?
How often should I run an SEO audit?
Can an SEO audit hurt my site?
Related guides
Sources
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