An SEO audit is a comprehensive review of how prepared your site is for both search engines and human visitors. It should be run when launching a new project, when competitors start pushing you off the first page, or when Google Search Console shows a sharp drop in impressions and clicks. The point of the audit is to preserve the strengths that already hold your rankings, document the weak spots and turn them into a clear three to six month roadmap.
Technical audit — how search engines see the site
The technical layer always begins with crawlability and indexability checks. You need to understand which pages Googlebot can actually reach, which are blocked by overly aggressive robots.txt rules and which have fallen out of the index because of noindex tags or conflicting canonical signals. The sitemap.xml is reviewed to make sure it lists current URLs only, broken links are cleaned up and any redirect chains longer than one hop are flattened to preserve link equity.
The next layer is Core Web Vitals and the mobile experience. LCP should land under 2.5 seconds, INP under 200 milliseconds and CLS under 0.1. In a mobile-first index, the way the site behaves on a phone matters more than the desktop version, so every key template type is opened on a real device and run through PageSpeed Insights separately for the homepage, category pages, product pages and articles.
On-page and content audit
The on-page review covers title tags, meta descriptions, heading hierarchy, URL structure and the way target keywords are placed across the page. Titles stay close to sixty characters, meta descriptions around one hundred and fifty-five, each page keeps a single H1 and target phrases appear naturally without stuffing. Schema markup for Article, Product, FAQ and Organization is verified template by template because structured data directly influences AI Overview citations and rich result eligibility.
The content audit surfaces thin pages, near-duplicates and keyword cannibalization. When multiple URLs fight over the same query, they are merged into a single stronger page or one of them is archived with a redirect. Outdated articles are refreshed with current statistics and examples, since Google increasingly demotes pages that quote a reality from two or three years ago.
Links, engagement and the new 2026 signals
The backlink audit runs through Ahrefs or Semrush and looks at domain rating, the number of referring domains and the distribution of anchor text. Toxic links are filed into a Disavow list and the mix of branded, generic and keyword anchors is kept within a natural ratio. Engagement data from GA4 — engagement rate, average engagement time and scroll depth — tells you whether each page actually holds the visitor long enough to deliver value.
In 2026 the checklist also includes AI Overview and SGE visibility, the strength of E-E-A-T signals and the trend in branded impressions. You verify whether Google's generative answers cite your domain, whether author pages exist with documented expertise, whether sources are linked and whether real-world experience is demonstrated. The core toolkit is Google Search Console, Ahrefs, Screaming Frog, GA4 and PageSpeed Insights. A small site takes four to six hours, a mid-size project two to three days and a large corporate portal one to two weeks of focused analysis.