Most websites have more SEO problems than their owners realise. A page that appears to load fine and looks professional on the surface may be riddled with technical issues, missing metadata, thin content, and broken internal links that are quietly suppressing its rankings. The only way to find out what is holding your site back is to run a systematic SEO audit.
An SEO audit is a comprehensive review of your website against best practice SEO criteria. It covers technical performance, on-page optimisation, content quality, and your link profile. The output is a prioritised list of fixes that, when implemented, can produce meaningful ranking improvements within weeks.
This checklist covers the 15 most impactful items to review and fix. Work through them in order — the technical foundations come first because they affect everything else.
What Is an SEO Audit?
An SEO audit is a structured process for evaluating how well your website is optimised for search engines. It examines the technical architecture of your site, the quality and optimisation of your content, the strength of your backlink profile, and the overall user experience your site provides.
The goal of an audit is not simply to find problems. It is to prioritise the fixes that will have the greatest impact on your organic traffic and rankings. A well-executed audit gives you a clear action plan rather than a generic list of warnings.
You can conduct a basic audit manually using free tools like Google Search Console, Google PageSpeed Insights, and Screaming Frog's free tier. For a deeper analysis, paid tools like Ahrefs, SEMrush, or Moz provide more comprehensive crawl data and competitor insights.
Technical SEO Checks (Items 1–5)
Technical SEO refers to the infrastructure of your website — the elements that affect how search engines crawl, index, and render your pages. These issues can prevent even perfectly written content from ranking.
Item 1 — Check your crawlability: Open Google Search Console and navigate to the Coverage report. Look for pages marked as "Excluded," "Error," or "Valid with warnings." Crawl errors, noindex tags on important pages, and blocked resources in your robots.txt file can all prevent Google from seeing your content. Item 2 — Verify your HTTPS status: Every page on your site should load over HTTPS. If any pages still load on HTTP, or if your SSL certificate has expired, browsers will warn visitors and Google will deprioritise your pages. Check your certificate expiry date and ensure all HTTP URLs redirect to their HTTPS equivalents. Item 3 — Fix broken links: Crawl your site using Screaming Frog or Ahrefs and identify all 404 errors. Broken internal links waste your crawl budget and create a poor user experience. Redirect broken URLs to the most relevant live page using a 301 redirect. Item 4 — Check page speed: Run your key pages through Google PageSpeed Insights and aim for a score above 90 on mobile. Common speed issues include unoptimised images, render-blocking scripts, excessive third-party plugins, and lack of browser caching. Page speed is a confirmed Google ranking factor on both desktop and mobile. Item 5 — Review your XML sitemap: Ensure you have a valid XML sitemap submitted to Google Search Console. Your sitemap should only include canonical, indexable URLs. Remove any URLs that return errors, are noindexed, or have been redirected. On-Page SEO Checks (Items 6–10)
On-page SEO refers to the optimisation of individual pages — the title tags, meta descriptions, headings, content structure, and internal linking that tell Google what each page is about.
Item 6 — Audit your title tags: Every page should have a unique, descriptive title tag that includes the primary keyword for that page. Title tags should be between 50 and 60 characters. Duplicate or missing title tags are a common audit finding that is straightforward to fix. Item 7 — Review meta descriptions: While meta descriptions are not a direct ranking factor, they influence click-through rates from search results. Each page should have a unique meta description of 150 to 160 characters that accurately summarises the page and includes a compelling reason to click. Item 8 — Check heading structure: Each page should have a single H1 that matches the page's primary topic. Use H2s and H3s to structure the content logically. Avoid skipping heading levels or using multiple H1 tags on a single page. Item 9 — Optimise image alt text: Every image on your site should have a descriptive alt text attribute. Alt text tells search engines what an image contains, and it serves as the fallback text when an image fails to load. Avoid generic phrases like "image1.jpg" or stuffing alt text with keywords. Item 10 — Fix duplicate content: Duplicate content occurs when the same or very similar content appears on multiple URLs. Use canonical tags to point Google to the preferred version of a page. Check for www vs non-www, trailing slash vs no trailing slash, and paginated pages that create duplicate content issues. Content Quality Checks (Items 11–12)
Google's core algorithm increasingly prioritises content that demonstrates Experience, Expertise, Authoritativeness, and Trustworthiness (E-E-A-T). Thin or low-quality content can drag down the performance of your entire website.
Item 11 — Identify thin content pages: Pages with fewer than 300 words, pages that are essentially duplicates of other pages, or pages that provide no unique value are considered thin content. Either expand these pages with genuinely useful information, merge them with similar pages, or remove and redirect them. A well-structured content plan helps prevent this problem from recurring. Item 12 — Update outdated content: Content that references old statistics, discontinued products, or superseded advice sends a negative freshness signal to Google. Review your top-traffic pages annually and update any information that is no longer accurate. Refreshing old content with new data and examples is one of the fastest ways to recover declining rankings. Link Profile Checks (Items 13–14)
Your backlink profile — the collection of external websites linking to yours — is one of the most powerful signals in Google's algorithm. Both the presence of quality links and the absence of toxic ones matter.
Item 13 — Review your backlink profile: Use Ahrefs or Google Search Console's Links report to see which websites are linking to you. Look for patterns — are you earning links from relevant, authoritative sources? Or are most of your links from low-quality directories or unrelated websites? Use this data to guide your ongoing link building strategy, including local citation building and outreach campaigns. Item 14 — Disavow toxic backlinks: If your site has a history of spammy link building, or if you have received a manual penalty from Google, you may need to disavow toxic links using Google Search Console's disavow tool. Only disavow links you are certain are harmful — incorrect use of the disavow tool can do more harm than good. If in doubt, consult an SEO professional before proceeding. User Experience Check (Item 15)
Google's Core Web Vitals are a set of user experience metrics that measure loading performance, interactivity, and visual stability. They are an official ranking factor, and poor scores can hold back otherwise well-optimised pages.
Item 15 — Review Core Web Vitals: In Google Search Console, navigate to "Experience" and then "Core Web Vitals." Look for pages flagged as "Poor" or "Needs improvement." The three metrics to focus on are Largest Contentful Paint (LCP, which measures loading speed), Interaction to Next Paint (INP, which measures responsiveness), and Cumulative Layout Shift (CLS, which measures visual stability). Address any pages scoring poorly, starting with your highest-traffic URLs. What to Do After Your Audit
Once you have completed your audit, you will have a list of issues ranging from quick wins to complex technical fixes. Prioritise them by the potential impact on rankings and the effort required to fix them. Here is a practical framework:
Fix critical technical errors first: Crawl errors, HTTPS issues, and broken redirects should be addressed immediately as they can prevent pages from being indexed at all. Then address on-page optimisation: Work through missing title tags, duplicate content, and thin pages. These fixes are generally low-effort with high impact. Build content and links systematically: Use a content plan to schedule new pages and updates. Pair this with ongoing link building to steadily grow your domain authority. Re-audit every quarter: SEO is not a one-time task. New issues emerge as your site grows, as Google's algorithm evolves, and as competitors change their strategies. Schedule a quarterly audit to keep your site in optimal condition. Final Thoughts
An SEO audit is one of the highest-return investments you can make in your website's performance. Most businesses are sitting on a collection of fixable issues that are suppressing their rankings. Working through even a portion of this checklist can produce noticeable results within 30 to 60 days.
Start with the technical foundations, move through on-page optimisation, and then address content quality and your link profile. If you need help interpreting your audit findings or implementing fixes, our team at Workspacein provides comprehensive SEO audit services with a clear, prioritised action plan delivered with every engagement. Book a call to get started.
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