SEO Audit Checklist: 25 Essential Steps

Review the Pages report in GSC for 'Not Indexed' entries. Common issues include 'Discovered but not indexed' (quality/crawl budget problem), 'Blocked by robots.txt', and 'Duplicate without canonical'. Each category requires a different fix strategy.

Fetch your robots.txt and verify it does not block CSS, JavaScript, or image files that crawlers need to render your pages. Use Google's robots.txt tester to check specific URLs. A common mistake is blocking `/api/` routes that serve content needed for rendering.

Check that your sitemap includes only 200-status indexable pages, excludes noindex pages, and has recent `lastmod` dates. Cross-reference the sitemap URL count with the number of indexed pages in GSC — a large gap indicates indexing problems.

Run a full crawl and export the results. Check for orphan pages (no internal links), redirect chains longer than 2 hops, 5xx server errors, and pages with excessively deep crawl depth (>4 clicks from homepage). Each issue wastes crawl budget.

Verify every page has a self-referencing canonical tag and that canonicals point to the correct preferred URL version. Common errors include canonical pointing to a redirected URL, HTTP instead of HTTPS, or trailing slash inconsistencies that create duplicate content.

Export all page titles from your crawl tool and sort by duplicates. Every indexable page needs a unique title between 50-60 characters that includes the primary target keyword. Pages sharing identical titles compete against each other in search results.

Review all meta descriptions for duplicates, missing values, and length (120-155 characters). While descriptions are not a direct ranking factor, they directly control your click-through rate in search results — a compelling description can double your clicks.

Check that every page has exactly one H1 containing the primary keyword, and that subsequent headings follow proper nesting (no H3 directly under H1). Broken heading hierarchy confuses search engines about content structure and hurts accessibility.

Check all images for missing alt attributes. Images with missing alt text are invisible to search engines and screen readers. Audit existing alt text for keyword stuffing — describe the image naturally and include the target keyword only when it is genuinely relevant.

Export all internal links and check their anchor text. Generic anchors like 'click here' or 'read more' waste linking value. Descriptive anchors that include the target page's keyword help search engines understand the linked page's topic and improve its ranking potential.

Run your 20 highest-traffic pages through PageSpeed Insights and record LCP, INP, and CLS for both mobile and desktop. Prioritize fixing pages with LCP over 2.5s — Google explicitly uses Core Web Vitals as a ranking signal, and mobile scores are weighted more heavily.

Scan for any HTTP resources (images, scripts, stylesheets) loaded on HTTPS pages. Mixed content triggers browser warnings, breaks trust indicators, and can prevent indexing. Use the crawl tool to find all HTTP URLs referenced in your pages.

Test every page with structured data using Google's Rich Results Test. Check for required fields, deprecated properties, and warnings. Invalid schema markup is silently ignored — you might think you have FAQ rich results when Google is actually ignoring your markup entirely.

Review the Mobile Usability report for issues like clickable elements too close together, content wider than the screen, and text too small to read. Google uses mobile-first indexing, so mobile usability issues directly impact your rankings on all devices.

Identify redirect chains (A redirects to B redirects to C) using your crawl tool. Each hop adds latency and loses a small amount of link equity. Update all links to point directly to the final destination URL. Pay special attention to chains created by HTTP-to-HTTPS and trailing-slash redirects.

Export word counts from your crawl tool and flag pages under 300 words. Thin pages rarely provide enough value to rank and can dilute your site's overall quality signal. Either expand them with genuinely useful content, consolidate them into stronger pages, or noindex them.

Use GSC Performance report filtered by query to find keywords where multiple pages from your site appear. When two pages target the same keyword, they split clicks and confuse Google about which to rank. Consolidate competing pages or differentiate their target keywords.

Review pages with dates (guides, statistics, annual reviews) for outdated information. Search engines demote stale content for time-sensitive queries. Update statistics, screenshots, and recommendations to reflect current data, and update the published/modified date.

Search each target keyword and examine what type of content ranks on page one — informational articles, product pages, comparison tables, or videos. If your content format does not match the dominant intent, it will not rank regardless of quality. Realign content types to match SERP intent.

Use Ahrefs Content Gap or Semrush Keyword Gap to find keywords your competitors rank for that you do not cover at all. Prioritize gaps where you have topical authority and the keyword has commercial or navigational intent — these are your highest-ROI content opportunities.

Pull your backlink data from Ahrefs, Semrush, or GSC Links report. Check for toxic links from spam sites, link farms, or irrelevant directories. A handful of toxic backlinks rarely cause problems, but a pattern of low-quality links can trigger a manual action or algorithmic demotion.

Review recently lost backlinks in your SEO tool. If a high-authority page that linked to you removed the link or changed it, investigate why. Common causes include page redesigns, link rot, and content consolidation — many can be recovered with a simple outreach email.

Cross-reference your top linked pages with their current HTTP status. Pages that have been deleted or redirected lose a portion of their backlink value. If a page with 50+ backlinks was removed, either restore it or set up a 301 redirect to the most relevant replacement.

Export anchor text data and check for over-optimized patterns. If 80% of your anchors are exact-match commercial keywords, it signals manipulation to search engines. A natural profile includes branded anchors, URL anchors, generic phrases, and a small percentage of keyword-rich anchors.

Use Ahrefs' Link Intersect to find domains that link to two or more competitors but not to you. These sites have demonstrated willingness to link to content in your niche. Create a targeted outreach list with specific content suggestions for each prospect.