Every SEO audit tool produces a score out of 100 and a list of red, amber and green items. The score is mostly theatre. What matters is the handful of findings that actually block rankings, and knowing which ones those are, because a typical report lists forty items and maybe four of them are worth an afternoon. This guide walks through what an on-page audit checks, which findings to act on first, and which to ignore, so you can read any audit, including our All-in-One SEO Site Analyzer, without being led by the colour coding.
What an on-page audit can and can’t see
An automated audit fetches a URL and inspects the HTML and response. It sees: title, meta description, headings, images and their alt text, links, canonical tags, robots directives, structured data, page size, response time, HTTPS, mobile viewport tag. It does not see: rankings, backlinks, traffic, search intent, or whether the content is any good. So treat it as a technical checklist for one page, not a verdict on the site.
Findings that block rankings: fix today
- Page returns non-200 or is noindexed. Nothing else matters until this is fixed. Check the robots meta tag and the X-Robots-Tag header (the HTTP Header Checker shows the latter).
- Canonical points elsewhere. If the canonical tag names a different URL, Google will index that one instead. Common after migrations and on paginated or filtered pages.
- Missing or duplicate title tag. The title is the strongest on-page signal. Duplicates across pages make them compete with each other.
- No H1, or multiple H1s that disagree. One H1 that matches the title’s meaning. Several H1s aren’t fatal but usually indicate a theme problem.
- Not mobile-friendly. Missing viewport tag or content wider than the screen. Google indexes the mobile version.
- Blocked resources. CSS or JS blocked in robots.txt means Google renders the page wrong. The Robots.txt Generator article covers this.
Findings that cost traffic: fix this week
- Missing meta description. Not a ranking factor, but Google will write one for you and it will be worse. See the SERP Snippet Preview.
- Images without alt text. Accessibility first, image search second. Describe what is in the image; don’t stuff keywords.
- Slow response (over 600 ms TTFB) or heavy page (over 2 MB). Core Web Vitals are a ranking signal at the margin and a conversion factor always.
- Thin content. Under about 300 words on a page that is supposed to rank for an informational query. Word count is not a target, but very short pages rarely satisfy intent.
- No internal links in or out. Orphan pages don’t get crawled or ranked. Every page should have at least three internal links pointing to it and link out to related pages.
- Missing structured data where a rich result is available (FAQ, HowTo, Product, Article). Not required, but it wins SERP space.
- Broken links on the page. The Broken Links Checker finds them across the whole site.
Findings that are mostly noise
Audit tools flag these because they are easy to detect, not because they matter:
- Keyword density outside extreme ranges. See the density article; there is no target.
- Meta keywords tag missing. No search engine has used it since 2009.
- Text-to-HTML ratio. Modern pages are mostly markup. Ignore.
- Title too long by three characters. Pixel width matters, not character count, and Google truncates gracefully.
- Multiple H2s / heading order not perfect. Google reads headings for structure, not for strict nesting.
- “Page has no Facebook shares.” Social counts are not a ranking factor.
- Doctype, favicon, deprecated HTML tags. Tidy up if you like; no ranking impact.
How to run an audit that produces action
- Pick the five pages that matter most (highest traffic, or the ones you need to rank). Audit those, not the homepage only.
- For each, list only findings from the first two groups above.
- Fix in that order: blocking issues, then titles and descriptions (fastest win), then speed, then content depth and internal links.
- Re-run in four weeks and compare Search Console impressions and average position for those pages. That comparison, not the audit score, is the result.
- Repeat for the next five pages.
A site-wide crawl is still worth doing quarterly to catch new duplicates, broken links and stray noindex tags, but the page-by-page approach is what moves rankings.
Frequently asked questions
What is a good SEO audit score?
The score is tool-specific and weights trivial items alongside serious ones. Anything above 80 with no red items in the “blocking” categories is fine; chasing 100 wastes time.
How long does it take to see results after fixing audit issues?
Title and description changes can show in impressions within days. Content and internal linking changes take four to twelve weeks. Speed improvements affect Core Web Vitals reports after 28 days of data.
Should I fix every issue the audit lists?
No. Fix the blocking and traffic-costing ones. Most of the rest are cosmetic.
Does an SEO audit check backlinks?
Not an on-page audit. Backlink analysis needs a separate tool with its own crawl index (Ahrefs, Semrush, Moz, or Google Search Console’s Links report for your own site).
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