How to audit on-page SEO?
What 'on-page SEO' actually covers
On-page SEO refers to all the elements within your control on any given page — as opposed to off-page factors (like backlinks from other sites) or technical factors (like server configuration). The key on-page elements are: the page's title tag (shown in the browser tab and as the headline in search results), the meta description (the short summary shown under the title in results), the heading structure (H1, H2, H3), the body content itself, internal links pointing to and from this page, image alt text, and the canonical tag (which declares this as the definitive version of the page if duplicates exist).
How to check titles and meta descriptions efficiently
The quickest way to audit titles and meta descriptions across an entire site is to crawl it with a tool that exports a spreadsheet of all URLs with their current titles and descriptions alongside the character counts. You're looking for: pages missing a title or description entirely, pages where the title or description exceeds the recommended length (roughly 60 chars and 160 chars respectively), pages sharing identical titles or descriptions with other pages on the site, and pages where the title doesn't actually reflect the page's main topic.
Assessing content quality as part of an on-page audit
Technical on-page elements are relatively quick to check; content quality is harder to assess at scale but arguably more important. Search engines have become progressively better at evaluating whether a page's content genuinely satisfies user intent — whether it actually answers the question implied by the keywords it targets, or whether it's thin content that appears relevant on the surface but delivers little real value. For each important page, ask honestly: if this page appeared in search results and a visitor clicked through, would they find what they were looking for, or would they immediately go back and click the next result?
Key Takeaways
- On-page SEO covers titles, descriptions, headings, content, links, alt text, and canonicals.
- Crawling and exporting a spreadsheet is the most efficient way to audit titles and descriptions at scale.
- Content quality matters as much as technical on-page elements for modern rankings.