How to Do an SEO Audit Yourself: The Complete Guide

An SEO audit is a systematic evaluation of your website's health across technical, on-page and off-page dimensions. It identifies the issues preventing your site from ranking as well as it should. A thorough SEO audit is the starting point for every client engagement I take on - it turns vague underperformance into a specific, prioritised action list.

The four dimensions of an SEO audit

1. Technical SEO audit

Crawl your website with Screaming Frog. Look for: broken links (4xx errors), redirect chains, duplicate titles and meta descriptions, missing H1 tags, pages blocked in robots.txt that should not be, pages with noindex that should be indexed, slow-loading pages (check against Core Web Vitals data in GSC), and missing canonical tags on duplicate or near-duplicate pages.

2. On-page SEO audit

Review your most important pages for: title tag quality and click-worthiness, meta description presence and quality, H1 and H2 structure, keyword targeting and search intent alignment, internal linking density, content depth and E-E-A-T signals, and image alt text completeness.

3. Content audit

In Google Search Console, identify: pages with impressions but no clicks (CTR problem), pages with clicks but declining positions (content freshness issue), pages with zero impressions (indexing or relevance problem). Also identify pages with thin content (under 300 words) that should be expanded or consolidated.

4. Backlink audit

In Ahrefs or Semrush, review your backlink profile for: toxic or spammy links, link velocity trends, anchor text distribution, and comparison against top-ranking competitors. Identify link gaps - topics your competitors have links for that you do not.

Prioritising your audit findings

Not all issues are equal. Prioritise by impact: indexing errors and crawl blocks first, then major technical issues, then on-page improvements, then content gaps. A broken canonical tag affecting 50 pages is more urgent than a suboptimal meta description on one page.

Conclusion

Run Screaming Frog on your site, check GSC for crawl and indexing errors, review your 10 most important pages for on-page basics, and check your backlink profile in Ahrefs. Those four steps form a complete DIY SEO audit that will surface the most important issues on most websites.