What is an SEO audit? Google publishes the spec

Google runs a page about hiring an SEO. Sitting inside it is a one-line specification for what an audit should produce, and it is narrower and duller than the checklist genre implies. We think it is the most useful definition available, for the plain reason that it is the only one whose author you can check.

What Google actually says an SEO audit is

Google's guidance for site owners hiring an SEO states the deliverable in a single sentence:

"An SEO audit should be about giving you realistic estimates of improvement, and an estimate of the work involved. If they guarantee you that their changes will give you first place in search results, find someone else."

Two things follow from that sentence:

• An audit is an estimate, not a result. Counting red rows is the wrong way to judge one
• The same page tells you to grant only read access to Search Console at audit stage, and not write access

That is a low bar, and a useful one. A document that arrives with no estimate of expected improvement and no estimate of the work involved falls short of what Google's own hiring guidance describes, whatever else it contains.

How Google tells site owners to judge SEO advice

Google's separate page on third-party SEO advice sets one test for any recommendation you receive, and adds a warning about tool numbers.

• Does the advice cite official Google Search documentation as supporting evidence?
• Or does it clearly qualify its claims as opinion, based on stated data or experience?
• Is a tool's number being presented as though it came from Google?

On that last point Google is blunt. Third-party tools have no access to its internal ranking data, and no tool is approved or endorsed by Google Search. We read a difficulty score as a vendor's model. We hold our own writing to the same test, which is why the guidance on third-party SEO tools is quoted here rather than paraphrased.

What the first layer turns up on 30 homepages

In August 2026 we fetched 30 Tamil Nadu engineering college homepages as raw HTML, with no JavaScript executed. This is one layer of an audit, on one page per site, not a full audit of 30 sites.

The four broken descriptions were specific rather than merely weak:

• One carried only the domain name
• One carried another page's canonical URL and description
• One still contained unfilled template placeholders
• One repeated the page title word for word

"Five of the 30 homepages we fetched were not fully readable without JavaScript, and two of those returned nothing at all."

Two of the 25 homepages that returned readable content had no visible enquiry path. That denominator is 25 rather than 30, because a page a machine cannot read cannot then be judged on its enquiry path.

Want this pass run on your own site? Our free SEO audit returns the findings rather than a score.

A missing meta description is a finding, not a verdict

Twelve missing descriptions sounds like twelve problems to fix. Google's own snippets documentation complicates that reading.

"Google primarily uses the content on the page to automatically determine the appropriate snippet. We may also use descriptive information in the meta description element when it describes the page better than other parts of the content."

The same page states there is no limit on how long a meta description can be, and that the snippet is truncated as needed to fit the device width. A finding of the form your description is too long therefore rests on a character range somebody chose, not on any threshold published in Google's snippets documentation.

• What Google publishes: no length limit, and truncation as needed to fit the device width
• What we use internally: a 140 to 155 character working range, which is our house rule and is labelled as ours whenever it appears in a client report

The five layers we run, in the order we run them

This ordering is ours rather than Google's. We run it bottom up because a fault in a lower layer makes every finding above it unreliable.

• 1

  Can a machine read the page at all, without executing JavaScript

• 2

  Does the page describe itself, in its title, description and headings

• 3

  Is the page indexed and eligible for a snippet, checked in Search Console

• 4

  Does the content answer what people actually search, checked against query data

• 5

  Does the page give a visitor somewhere to go next

Google's generative AI guidance supports starting at the bottom. A page must be indexed and eligible to be shown with a snippet before it is eligible for AI features at all, so layer four work on an unreadable page buys nothing. The two failures behind absence from AI answers both sit at layers one and three.

What an audit cannot tell you

An audit is a snapshot of supply. It reads what your site publishes and how machines receive it. It does not settle whether SEO earns its keep for you, and three further things sit outside it:

• Whether anyone is searching for what you sell, in the volume you assume
• Whether your enquiries are answered fast enough to convert
• Whether a competitor is simply outspending you on the same terms

Google's framing is consistent with that limit. Meeting every requirement and best practice still does not mean Google will crawl, index or serve a page, because indexing and serving are not guaranteed.

"We treat an audit as the cheapest way to remove the technical explanations for poor performance, so that the expensive questions get asked against a clean baseline."

Our metadata findings from 30 college homepages started at exactly that layer.