SEO audits: Do you need one and what a good audit should include

I have a complicated history with SEO audits. I've paid for several and found that most were just exports from a crawling tool dropped into a deck. No great prioritisation. No clear explanation. No sense of what actually mattered. Even the better ones were a bit thin. It was frustrating because I didn’t need a list of errors. I needed someone to tell me what I didn't already know and, in what order to fix it.

That frustration stuck with me, and I've seen the other side of it too.

I have gone into client projects where a previous SEO had advised changes that made things much worse with pages taken down for no reason and without proper process, broken redirects introduced during “optimisation”, entire sections of a site hidden from Google, and tagging systems ripped out because someone claimed they were “not SEO friendly”. Editorial teams given advice in 2020 that was from 2005. I have spent more time than I’d like untangling the mess left behind by audits that were either misunderstood or plain wrong.

That experience is a big part of why I take audits seriously. I've had clients be reticent for an audit because they've had a bad experience in the past. It doesn't have to be like that.

A good audit should make things clearer, not more complicated. It should help you understand which issues have real impact, which ones don’t, and what you should do next. It should leave you confident, not confused. Crucially it should provide you with a foundation for long term audience success.

When you probably need an SEO audit

1. You have seen a sudden or sustained drop in traffic

If Search or Discover has fallen sharply and you cannot explain why, an audit is often the only reliable way to diagnose the issue. Drops usually align with Google updates, migrations, crawling problems or changes introduced during a development release.

2. You have migrated your site in the past 18 months

Migrations are one of the biggest causes of SEO damage. I have seen sites lose traffic because of missing redirects, incorrect canonicals, broken sitemaps, duplicate pages, lost images and noindexed sections. These issues sometimes stay hidden until the next Google update exposes them.

3. Your site relies heavily on Search or Discover

If organic audience is a core part of your business, you need to understand how well you are meeting Google’s expectations. Discover in particular is volatile. If Discover is a major traffic driver, you should also build a stronger foundation in Search, email and other direct sources to reduce risk. An audit can help identify new opportunities.

4. You publish content at scale

Editorial sites create complexity: huge archives, inconsistent internal linking and tagging, duplicate content, pagination issues, multiple listing pages for the same topic and so on. These issues compound over time and affect both Search and Discover.

5. You suspect technical or indexing issues or manual penalties

Examples include a sudden rise in 404s, manual penalties that drop Google Discover clicks to zero, missing lead images in Google News or Top Stories, drops in indexed pages, changes in crawl patterns or unexpected noindex tags after a release.

When you probably don't need an audit

1. Your site is very small

If you only have a small site, a full audit might be an unnecessary expense until you've dug into it yourself a little. You can diagnose almost everything yourself using Search Console and a basic crawl using free tools like Screaming Frog.

2. You are mid rebuild or redesign

There is no point auditing a site you are about to replace. Save the audit for after launch when it can actually influence your setup and fixes. What you do need is a solid migration plan so that all the good work you've done in the past isn't lost because of poor execution or missing data. While you won't need a full audit, having a crawl of the old site you can compare it with the new site can be massively useful. It's a great way to identify missing pages before Google does and traffic drops.

3. Performance is stable and nothing significant has changed

If Search Console looks normal and your audience is steady, you may not need anything beyond basic checks. If you want to grow audience then it's likely more about content strategy and output.

What a good SEO audit should include

This part is important, because most audits still fall into the trap of simply listing issues without any real thinking behind them.

A high quality audit should include at the very least:

1. Technical analysis with context

Deep SEO analysis should include crawlability, indexing, redirects, response codes, broken links, site speed, Core Web Vitals, sitemap coverage, duplicate pages, canonical issues and robot directives. Not just the errors, but which fixes matter and why, as well as how to fix them without damaging the site further.

2. Content quality, duplication and thin content analysis

Old duplicates, messy archives, conflicting titles and outdated, thin articles can create a debt on your website that needs sorting out. Content quality needs a keen eye of someone who deeply understands user behaviour and engaging content, as well as how to target those readers effectively.

3. Tag, category and topic page structure

This is where large editorial sites usually fall apart. I regularly see multiple versions of the same topic page ranking in different ways, or pages that should rank completely ignored because tagging is inconsistent. This is not difficult to fix, but it needs someone to join the dots and tidy it up.

4. Evergreen opportunities and internal linking

Many sites rely too heavily on news or short term content. Other only on evergreen. A proper audit should identify long term evergreen pieces you can own, where to place them, and how new articles should link back to them. It should also identify areas where short term content like news can boost topical authority.

5. Google News and Discover behaviour

Discover is headline and image led, and Google News cares about structure, quality and authority. An audit should explain how well your stories meet these standards and what you need to fix.

6. Backlink and authority analysis

Which pages earn links, where you are losing valuable links, what competitors are doing and where your biggest offsite opportunities are.

7. Competitor performance

This shows you what others are ranking for, what evergreen topics work well, and where you can realistically improve.

8. A prioritised RAG list

This is the part that turns an audit into a plan.

• Red issues are urgent and high impact.
• Amber issues are important but not immediately harmful or are harder to do.
• Green issues are minor improvements or opportunities rather than problems.

Without prioritisation, you are just looking at a long list of tasks with no sense of what actually matters.

Once a prioritised list exists then it's time to work with editorial and development teams to size up the scope and effort of the fixes. Do this right and you get a great list of work that you can start right away.

Checks you can do yourself before you pay anyone

You can do a surprising amount on your own. However be careful, if you're not sure how best to fix the issue then it's worth asking an SEO expert.

1. Run Screaming Frog for free (up to 500 URLs)

This alone will show you broken links, missing titles, noindexed pages, incorrect canonicals and basic metadata problems. It also catches silly but serious mistakes like a key page being noindexed after a release. I have seen this happen more than once. It might not cover your whole site, but it might highlight some obvious issues to work on.

2. Look at Google Search Console

If anything looks off here, and performance has dipped, an audit is a good idea.

So, do you need an SEO audit?

If your traffic is steady and your site is small or stable, you may not need one now. If you are experiencing drops, have migrated recently, rely on organic growth, or suspect something is broken behind the scenes, an audit can save months of guesswork and give you a clear path forward.

A good audit is not about impressing you with hundreds of findings. Neither is it about overly focusing on one element like page speed which might be very difficult to move the needle on. It is about clarity, prioritisation and confidence. It gives you a complete understanding of what is happening on your site and a realistic plan for improving it.

SEO also takes time. You need to be doing the right things consistently and unless there are some very obvious flaws it can take months to see the results. In my experience it takes six months to really see the fruits of your labour, but once you get things right and are consistent it's relatively reliable, despite the advent of AI in search.