How to Run a DIY SEO Audit (Step by Step)

Your traffic is flat and you have no idea why. That is what an SEO audit fixes.

An audit is not magic. It is a structured walk through your site, looking for the reasons Google struggles to find, understand, or trust your pages. You do not need an agency retainer or a stack of paid tools to start. You need a browser, a free crawler, Google Search Console, and a few focused hours.

This guide walks you through a full DIY SEO audit in order. Work top to bottom. Each layer builds on the one before it. Fixing content is pointless if Google cannot crawl the page in the first place.

Start with crawlability and indexing

Before anything else, confirm Google can actually reach and store your pages. A beautiful page that is blocked or noindexed earns zero traffic.

Open Google Search Console and go to the Pages report under Indexing. This tells you how many pages are indexed and, more useful, why others are not. Watch for buckets like “Excluded by noindex tag,” “Blocked by robots.txt,” “Crawled – currently not indexed,” and “Discovered – currently not indexed.” Each label is a lead.

Then run these manual checks:

• Type site:yourdomain.com into Google. Roughly how many results show up? Wildly more or fewer than expected signals a problem.
• Open yourdomain.com/robots.txt in your browser. Make sure you are not accidentally blocking important folders.
• Check that your XML sitemap exists, loads, and is submitted in Search Console.
• Use the URL Inspection tool on a few key pages to confirm they are indexed and see the last crawl date.

If important pages are missing from the index, stop and fix that first. Nothing downstream matters until they can be found.

Audit your on-page basics

Now check what Google reads when it lands on a page. This is the highest-leverage work in most audits because it is fast and directly tied to rankings.

Run a free crawler across your site to pull every title tag, meta description, and heading at once. Then hunt for these issues:

• Missing or duplicate title tags. Every page needs a unique, descriptive title with its main keyword near the front.
• Weak meta descriptions. These do not rank you directly, but they drive clicks from search results. Write them for humans.
• Broken heading structure. One clear H1 per page. Subheadings in a logical order, not chosen for how big the font looks.
• Thin or empty pages. Pages with almost no content confuse Google about what you offer.
• Keyword mismatch. Does the page target one clear intent, or is it trying to rank for five unrelated things at once?

Sort your crawl by page and knock out the templated problems in bulk. Fixing 40 missing titles in an afternoon is one of the best hours you will spend on SEO. Solid on-page work depends on solid keyword research underneath it, so make sure each page is mapped to a real search intent before you rewrite.

Check the technical layer

Technical SEO is where good content quietly dies. A page can be perfect and still lose because it loads slowly or breaks on mobile.

Focus on the checks that move the needle:

• Page speed. Run your top pages through Google’s PageSpeed Insights. Look at Core Web Vitals. Large images and bloated scripts are the usual culprits.
• Mobile usability. Load your site on an actual phone. Tap the buttons. If it is painful for you, it is painful for Google.
• HTTPS. Every page should load over a secure connection with no mixed-content warnings.
• Broken links and redirects. Your crawler will flag 404 errors and redirect chains. Fix the internal ones first.
• Duplicate URLs. Watch for the same content living on multiple URLs. Canonical tags tell Google which version is the real one.

You do not need to fix every warning. Rank the technical issues by how many pages they affect and how directly they hit user experience. A sitewide speed problem beats a single broken link every time. For a deeper pass on this layer, see our guide to a technical SEO checklist.

Review your content and search intent

Rankings follow relevance. This step asks a blunt question of every important page: does it actually answer what the searcher wanted?

Pick your top pages by traffic and by business value. For each one, search the target query yourself and study the results that already rank. If the top results are step-by-step guides and your page is a thin product blurb, you have an intent mismatch. No amount of technical polish fixes that.

Look for these content problems:

• Outdated pages. Old prices, dead references, and stale advice erode trust. Refresh or retire them.
• Cannibalization. Two of your own pages targeting the same keyword split your authority. Merge them or differentiate the intent.
• Content gaps. Questions your audience asks that you have never answered. These are your next posts.
• Weak internal linking. Your strongest pages should pass link value to the pages you want to rank.

Search is also shifting toward AI answers, where citations matter as much as blue links. If you want your pages surfaced inside AI-generated responses, review how to structure content for AI search optimization while you are already in the content.

Look at links and authority

Content earns relevance. Links earn trust. You want to know who points at your site and whether those links help or hurt.

Use Search Console’s Links report to see your top linked pages and the sites linking to you. You are checking three things: whether reputable sites reference you, whether your best content attracts any links at all, and whether anything spammy is piling up. Most small sites do not have a toxic-link problem. They have a not-enough-links problem, which you solve with better content and real outreach, not shortcuts.

Turn findings into a prioritized fix list

An audit is worthless as a pile of notes. Its only output that matters is a ranked action list.

Score every issue on two axes: impact (how much traffic or trust it could move) and effort (how long it takes to fix). Then attack in this order:

• High impact, low effort first. Missing titles, noindex mistakes, broken internal links. Quick wins that compound.
• High impact, high effort next. Content rewrites, site speed overhauls, information architecture.
• Low impact items last, or never. Not every warning deserves your time.

Re-run the audit every quarter. SEO is not a one-time cleanup. It is maintenance, and the sites that treat it that way keep pulling ahead.

Getting started

Pick one page that matters to your business and run these six steps on it today. Confirm it is indexed, sharpen the title, check its speed, match it to real intent, review its links, and log every fix. One page done properly teaches you the pattern for the whole site.

If your list of findings is longer than your time, we can help. The team at Neurounit runs AI-assisted SEO audits and builds the systems to fix what they uncover. Come talk it through in our Telegram bot and we will point you at the highest-leverage move for your site.