SEO Audit Checklist: 15 Things to Fix on Your Website Today

Most websites are leaving rankings on the table — quietly.

A page can look perfectly fine on the surface and still be weighed down by broken internal links, missing metadata, thin content, or technical issues that Google notices even when your visitors don't. The only way to find out what's actually holding you back is to audit the site properly.

This is a 15-point checklist of the higher-impact things to look at. Work through them in order if you can — the technical items sit underneath everything else, so fixing them first tends to make the rest of the work pay off more.

What Is an SEO Audit?

An SEO audit is a structured walk-through of how well your site is set up for search. It looks at the technical side of things, the quality of your content, how strong your backlink profile is, and the experience people get when they land on a page.

The point of an audit isn't just to find problems — that's the easy part. The harder, more valuable part is working out which fixes will actually shift the needle on traffic and rankings, so you're not wasting time on cosmetic issues. A decent audit hands you a prioritised action plan, not a pile of warnings.

The Tools You Actually Need

You don't need a $500/month stack to run a useful audit. Most of the heavy lifting can be done with free tools — the paid ones mostly make it faster and add competitor data.

Technical SEO Checks (Items 1–5)

Technical SEO is the plumbing — the stuff that decides whether search engines can crawl, index, and render your pages. If this layer is broken, even great content won't rank.

1 Check your crawlability

Open Google Search Console and go to the Coverage report. Look for pages marked "Excluded," "Error," or "Valid with warnings." Crawl errors, rogue noindex tags on important pages, and blocked resources in your robots.txt file can all prevent Google from seeing content that would otherwise rank.

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 the certificate expiry and make sure all HTTP URLs 301-redirect to their HTTPS equivalents.

3 Fix broken links

Crawl the site with Screaming Frog or Ahrefs and flag every 404. Broken internal links waste crawl budget and create a poor user experience. Redirect each broken URL to the most relevant live page with a 301.

4 Check page speed

Run your key pages through Google PageSpeed Insights and aim for a mobile score above 90. Common speed killers: unoptimised images, render-blocking scripts, too many third-party plugins, no browser caching. Page speed is a confirmed ranking factor on desktop and mobile.

5 Review your XML sitemap

Make sure you have a valid XML sitemap submitted in Search Console, and that it only includes canonical, indexable URLs. Prune anything that returns an error, is noindexed, or has been redirected — a messy sitemap wastes Google's crawl budget on URLs that will never rank.

On-Page SEO Checks (Items 6–10)

On-page SEO is the work you do at the page level — title tags, meta descriptions, headings, internal links, and how the content is structured. It's everything that tells Google what a specific page is actually about.

6 Audit your title tags

Every page should have a unique, descriptive title tag that includes its primary keyword. Aim for 50–60 characters. Duplicate or missing titles are a common audit finding and one of the easiest to fix.

7 Review meta descriptions

Meta descriptions aren't a direct ranking factor, but they drive click-through from the search results page. Write unique, 150–160 character descriptions that actually give someone a reason to click — not keyword soup.

8 Check heading structure

One H1 per page, matching the page's primary topic. H2s and H3s for structure. Don't skip heading levels and don't use multiple H1s — screen readers and Google both expect the hierarchy to make sense.

9 Optimise image alt text

Every image needs descriptive alt text. It tells search engines what the image contains, and it's the fallback text when an image fails to load. Don't leave it as "image1.jpg" and don't stuff it with keywords.

10 Fix duplicate content

Duplicate content happens when the same or very similar content appears on multiple URLs. Use canonical tags to point Google to the preferred version. Watch for www vs non-www, trailing slash vs no trailing slash, and paginated archives creating duplicates.

Thin and outdated pages don't just fail to rank — they quietly drag the rankings of your strong pages down with them. Pruning is as important as publishing.

Content Quality Checks (Items 11–12)

Google's core algorithm leans harder on content that shows Experience, Expertise, Authoritativeness, and Trustworthiness (E-E-A-T). Thin or outdated pages can quietly drag the rankings of your whole site down.

11 Identify thin content pages

Pages under 300 words, near-duplicates of other pages, or pages that add no unique value are flagged as thin content. Expand them, merge them with similar pages, or remove and redirect. A well-structured content plan keeps this from recurring.

12 Update outdated content

Content with old statistics, discontinued products, or superseded advice sends a negative freshness signal. Review your top-traffic pages annually and update anything that's no longer accurate. Refreshing old content with current data is one of the fastest ways to recover declining rankings.

Link Profile Checks (Items 13–14)

Your backlink profile — the set of external sites linking to yours — is still one of the most powerful signals in Google's algorithm. Quality links matter. So does not being dragged down by toxic ones.

13 Review your backlink profile

Use Ahrefs or Search Console's Links report to see who's linking to you. Look for patterns — are the links from relevant, authoritative sources, or from low-quality directories and unrelated sites? Feed this into your ongoing strategy, including local citation building and outreach.

14 Disavow toxic backlinks

If your site has a history of spammy link building, or if you've received a manual penalty, you may need to disavow toxic links via Search Console. Only disavow links you're certain are harmful.

User Experience Check (Item 15)

Core Web Vitals measure loading speed, interactivity, and visual stability. They're an official ranking factor, and poor scores quietly hold back pages that are otherwise well-optimised.

15 Review Core Web Vitals

In Search Console, go to Experience → Core Web Vitals. Look for pages flagged as "Poor" or "Needs improvement." The three metrics to focus on:

• LCP (Largest Contentful Paint) — loading speed. Target: under 2.5s.
• INP (Interaction to Next Paint) — responsiveness. Target: under 200ms.
• CLS (Cumulative Layout Shift) — visual stability. Target: under 0.1.

Start with pages that rank in positions 4–15 — a bump in Core Web Vitals can be enough to push borderline pages onto page one.

What to Do After Your Audit

At the end of an audit you'll usually be sitting on a list that ranges from quick wins to genuinely annoying technical work. Sort by likely ranking impact × effort. A workable order of operations:

1. Fix critical technical errors first. Crawl errors, HTTPS issues, and broken redirects gate indexing — nothing else matters until these are clean.
2. Then address on-page optimisation. Missing title tags, duplicate content, thin pages. Generally low-effort with high impact.
3. Build content and links systematically. Use a content plan to schedule new pages and refreshes, paired with ongoing link building to grow domain authority.
4. Re-audit every quarter. SEO is not a one-time task. New issues emerge as the site grows, Google's algorithm evolves, and competitors move.

Frequently Asked Questions

Wrapping Up

An SEO audit is one of the better returns you can get on time spent improving your site. Most businesses are quietly sitting on a pile of fixable issues that are suppressing their rankings, and working through even part of this checklist can show real results inside 30–60 days.

Start with the technical foundations, move into on-page work, and then get stuck into content quality and your link profile. Measure, fix, re-audit.