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SEO concepts compared

SEO audit vs Site health score

What each one is, how they differ, when to use which, and how they should appear in a client report.

SEO audit

Use when: Before quoting ongoing SEO, a migration or a redesign, when decisions depend on what really matters.

Site health score

Use when: Between audits, to notice sudden changes such as a spike in broken links after a release.

Short answer

A site health score is an automated count of issues against one tool's rules, useful for spotting changes over time. An SEO audit is a person's judgement of which issues matter for this site, confirmed on the live pages and ranked by impact. Selling a rebranded score as an audit misleads clients: scores weight trivial and critical issues similarly, include false positives and differ between tools.

Reviewed October 30, 2026 against search engine documentation.

Definitions

SEO audit

A reviewed diagnosis of a specific site: tool data checked by a person, findings confirmed on the live site, and fixes prioritised for that site's situation.

Site health score

A single number produced by an SEO tool by counting detected issues against its own rules, usually without judging which issues matter for the site.

Side by side

AspectSEO auditSite health score
Produced byA person using tool dataA tool's automated rules
False positivesRemoved during reviewIncluded in the score
PrioritisationBy impact on this siteBy the tool's generic severity
Comparable across tools?Findings are, with evidenceNo, each tool scores differently
Best useDeciding what to fix and in which orderWatching for new problems between audits

When to use each

Use SEO audit when

  • Before quoting ongoing SEO, a migration or a redesign, when decisions depend on what really matters.
  • When a client needs a prioritised plan their developers can act on.

Use Site health score when

  • Between audits, to notice sudden changes such as a spike in broken links after a release.
  • As one input during an audit, never as the conclusion.

Common mistakes

  • Reporting a rising score as proof of better rankings or traffic.
  • Fixing low-impact warnings to raise the score while important issues wait.
  • Comparing scores from different tools as if they measured the same thing.

How it should appear in a client report

If a score appears in a report, name the tool, the date and what the score counts, and keep it separate from the audit's prioritised findings. The findings, each with evidence and a suggested owner, are the deliverable; the score is context.

See sample reports

Frequently asked questions

Should agencies stop showing health scores to clients?
They can show them as context, clearly labelled with the tool and date. They shouldn't present them as the outcome of an audit or as a measure of SEO success.
Can a site score 100 and still have SEO problems?
Yes. A perfect score only means the tool found nothing against its own rules. Content quality, relevance and competition aren't measured by it.

Tell us what your clients need

Share the service, rough scope and market. You'll get a written scope and quote to review. Nothing starts until you agree to it.

  • You keep the client relationship
  • Unbranded deliverables
  • Written scope before work starts