What Does a Full Site Audit Check For? A Plain-English Answer

The short answer

A full site audit checks four main things: whether search engines can crawl and index your pages, whether your site is technically healthy (speed, mobile-friendliness, broken links, redirects), whether each page is optimized on-page (titles, headings, content quality, keyword targeting), and whether your site structure and links guide both users and Google efficiently. In plain terms, it answers one question: is anything on this website stopping it from ranking?

Everything else in this post is a deeper look at each of those areas, written as the kinds of questions people actually ask.

What exactly is a full site audit?

A full site audit is a systematic review of every page and technical signal on a website to find issues that hurt search visibility. Think of it like a home inspection before you sell a house. The inspector doesn't just look at the paint color. They check the foundation, the wiring, the plumbing, and the roof, then hand you a prioritized list of what's broken and what to fix first.

An SEO audit does the same for your website. A crawler visits your pages the way Googlebot would, gathers data on how each page is built and linked, and flags the problems that matter. The output isn't a vague grade, it's a specific list of fixable issues.

If you want the full walkthrough of the process from start to finish, our [complete guide to auditing your site for SEO](/blog/website-audit-seo-guide) covers the workflow step by step. This post focuses on what gets checked and why it matters.

What does a site audit check first: crawling and indexing?

Yes. Before anything else matters, Google has to be able to find and store your pages. A site audit checks:

• Crawlability — Can search engine bots reach your pages, or are they blocked by your robots.txt file, a login wall, or broken navigation?
• Indexability — Are pages accidentally set to "noindex" when they should be indexed? Are pages being indexed that shouldn't be, like staging URLs or thin tag pages?
• Sitemap accuracy — Does your XML sitemap list your real, live URLs, or is it full of redirects, 404s, and pages you deleted months ago?
• Crawl errors — Server errors (5xx), not-found errors (404s), and pages that redirect endlessly.

This stage comes first for a reason. A beautifully optimized page that Google can't crawl is invisible. If the audit surfaces a lot of these problems, our guide on [how to fix crawl errors found in a site audit](/blog/how-to-fix-crawl-errors) walks through resolving them without breaking other parts of your site.

Does a site audit check technical SEO?

Absolutely. Technical SEO is the plumbing of your website, and a full audit inspects all of it:

Site speed and Core Web Vitals

How fast do pages load? Do they shift around while loading (bad for users and rankings)? Slow, janky pages frustrate visitors and can suppress rankings, especially on mobile.

Mobile-friendliness

Google uses mobile-first indexing, which means it primarily evaluates the mobile version of your site. An audit checks whether text is readable, buttons are tappable, and content isn't cut off on smaller screens.

HTTPS and security

Is your site served over a secure connection? Are there mixed-content warnings where a secure page loads insecure resources?

Redirects and broken links

Redirect chains (A redirects to B redirects to C) waste crawl budget and slow users down. Broken internal links send visitors and bots into dead ends. An audit maps all of these.

Duplicate content and canonicals

When multiple URLs show near-identical content, Google struggles to know which one to rank. Audits flag duplicate pages and check whether canonical tags point to the correct "master" version.

What on-page elements does a site audit review?

This is where the audit gets granular, checking the elements on each individual page:

• Title tags — Missing, duplicated, too long, or not descriptive of the page's topic.
• Meta descriptions — Absent or duplicated across pages.
• Heading structure — Multiple H1s, skipped heading levels, or headings that don't describe the content.
• Content depth and quality — Thin pages with little useful text, or pages that don't clearly answer the query they target.
• Image optimization — Missing alt text and oversized image files that slow the page down.
• Keyword targeting — Whether the page clearly signals what it's about, and whether multiple pages compete for the same term.

For a page-by-page checklist you can work through manually, our [on-page SEO audit checklist](/blog/on-page-seo-audit-checklist) breaks down every element worth reviewing.

Does a site audit check for keyword cannibalization?

Yes, and it's one of the most overlooked problems it catches. Keyword cannibalization happens when several of your own pages target the same keyword, so they compete against each other in search results. Instead of one strong page ranking well, you get two or three weak pages splitting the authority and confusing Google about which to show.

A thorough audit identifies these overlapping pages so you can consolidate, redirect, or re-focus them. This alone can lift rankings without creating a single new piece of content.

What about internal linking and site structure?

A good audit examines how your pages connect to each other. Internal links pass authority between pages and help Google understand which pages are most important. The audit looks for:

• Orphan pages — Pages with no internal links pointing to them, which are hard for Google to discover and rank.
• Shallow linking — Important pages buried many clicks from the homepage.
• Anchor text signals — Whether the words used in links describe the destination page.

Strong internal linking is one of the cheapest, highest-impact fixes an audit uncovers, because you already own all the pages involved.

What does a site audit NOT check?

Honesty matters for trust, so here's the boundary. A standard site audit focuses on things you control on your own website. It does not fully evaluate:

• Backlink quality — The links other sites point at yours (that's a separate off-page analysis).
• Whether your content will actually rank — An audit fixes technical and structural barriers, but ranking still depends on content quality, search intent, and competition.
• Your business strategy — It tells you what's broken, not which keywords will grow your revenue.

An audit removes the obstacles. What you build on that clean foundation is up to you.

How often should you run one?

For most small sites, a full audit every quarter is sensible, plus a fresh audit after any major change: a redesign, a migration, a platform switch, or a big content push. Larger sites that publish frequently benefit from monthly checks, because new pages introduce new issues.

Turn the checklist into an actual report

Reading about what an audit checks is one thing. Seeing it run against your own site is where it clicks. Sweto's [Full Site Audit tool](https://swetofix.com/site-audit) crawls your pages, groups the problems by severity, and hands you a prioritized fix list instead of a wall of raw data. You can explore the [full Sweto SEO toolkit](https://swetofix.com) to see how the audit connects with cannibalization scanning, internal link discovery, and ranking investigations.

Run the audit once, and "what does a site audit check for" stops being an abstract question and becomes a to-do list you can actually work through.