# Technical SEO Audit: What to Check and in What Order

SEO · Published 2026-06-22 · Updated 2026-06-22 · RankMonks
Source: https://rankmonks.com/blog/technical-seo-audit

> Short answer: A technical SEO audit is a structured review of whether search engines can crawl, render, index and understand your site. Check in this order: crawl access, indexing, duplicates and canonicals, redirects and errors, site structure, page experience, then structured data. Fix problems in the same order, because each layer depends on the one before.

A technical SEO audit is a structured review of your website's infrastructure to find anything that stops search engines from crawling, rendering, indexing or understanding your pages.

It does not judge whether your content is good. It checks whether your content has a fair chance of being seen at all. A strong page behind a blocked directory, a broken redirect or a stray noindex tag is invisible.

The order of checks matters. There is little point tuning page speed on pages that are not indexed. This guide follows the order a crawler experiences your site: access first, then indexing, then quality of experience. You need Google Search Console, a crawler such as Screaming Frog, and a list of the pages that matter most to the business.

## Key takeaways

- A technical SEO audit checks whether search engines can reach, render, index and interpret a site, and it is separate from a content review.

- Audits should follow the path a crawler takes, starting with crawl access and indexing before moving to speed and structured data.

- Most serious technical problems fall into a small number of groups: blocked pages, unintended noindex tags, duplicate URLs, broken redirects and orphaned pages.

- Core Web Vitals are assessed at the 75th percentile of page loads, with good thresholds of 2.5 seconds or less for LCP, 200 milliseconds or less for INP and 0.1 or less for CLS.

- An audit is only useful when its findings are ranked by impact and effort, so that the fixes which affect the most important pages happen first.

## What should you check, and in what order?

Check crawl access, then indexing, then duplication, then redirects and errors, then structure, then page experience, then structured data. Each stage depends on the one before it.

| Order | Area | The question | Main places to look |
| --- | --- | --- | --- |
| 1 | Crawl access | Can bots reach the pages? | robots.txt, XML sitemap, server responses |
| 2 | Indexing | Are the right pages in the index? | Page indexing report, noindex tags |
| 3 | Duplication | Is there one clear version of each page? | Canonical tags, URL variants |
| 4 | Redirects and errors | Do links lead where they should? | Status codes, redirect chains |
| 5 | Site structure | Can bots and people find every page? | Internal links, click depth, orphan pages |
| 6 | Page experience | Is the page fast, stable and mobile friendly? | Core Web Vitals, mobile rendering, HTTPS |
| 7 | Structured data | Is the content labelled correctly? | Schema validation |

## How do you check crawling and indexing?

Confirm that nothing important is blocked, then compare the pages you want indexed with the pages that actually are. These two checks find the most damaging problems, so do them first.

1. **Read robots.txt.** This file tells crawlers which paths they may fetch. Look for disallow rules that cover sections you want found. A single leftover line from a staging site can block everything.

2. **Review the XML sitemap.** It should list only live, indexable pages that you want in search. Remove redirected, broken and noindexed URLs, and submit the sitemap in Search Console.

3. **Open the page indexing report.** Search Console groups excluded pages by reason. Work through each reason and decide whether it is intended. "Excluded by noindex tag" is fine for a thank-you page and a serious fault for a product page.

4. **Inspect priority pages.** Use the URL inspection tool on your key pages to see whether each one is indexed and which canonical Google selected.

5. **Check rendering.** If your site relies on JavaScript to load content, view the rendered HTML in the inspection tool. Confirm that the main text and links are present, not just an empty shell.

Remember that robots.txt controls crawling, while a noindex tag controls indexing. If robots.txt blocks a page, crawlers cannot read a noindex tag on it.

## How do you find duplicate content, redirect and structure problems?

Use your crawl export to look for multiple URLs serving the same content, links that pass through redirects or hit errors, and pages that few or no internal links point to.

**Duplication and canonicals**

- Check that only one version of the site resolves: one protocol and one hostname, with the others redirecting to it.

- Look for the same page available under several URLs because of tracking parameters, filters, trailing slashes or capital letters.

- Confirm each indexable page has a canonical tag pointing to the preferred URL, usually itself. A canonical tag is a hint that names the main version among duplicates.

**Redirects and errors**

- Fix internal links that point to pages returning 404 errors.

- Update internal links that point to redirected URLs so they go straight to the final address.

- Shorten redirect chains, where one redirect leads to another, into a single step.

**Site structure**

- Find orphan pages, which exist but have no internal links pointing at them. Compare the sitemap with the crawl to spot these.

- Check click depth. Important pages should be reachable in a few clicks from the home page.

- Review how pages link to each other. Our guide to [internal linking](/blog/internal-linking) covers this in detail.

## How do you check page experience and structured data?

Measure Core Web Vitals with real-user data, confirm the mobile version carries the full content, and validate any schema markup. These checks come last because they refine pages that are already indexed.

[Core Web Vitals](/blog/core-web-vitals) are three measurements of how a page feels to use:

- **Largest Contentful Paint (LCP)** measures loading. Good is 2.5 seconds or less.

- **Interaction to Next Paint (INP)** measures responsiveness. Good is 200 milliseconds or less. INP replaced First Input Delay as a Core Web Vital in March 2024.

- **Cumulative Layout Shift (CLS)** measures visual stability. Good is 0.1 or less.

Each is judged at the 75th percentile of page loads, so most of your visits need to meet the threshold, not just the average one.

Then check the following:

- **Mobile.** Google predominantly uses the mobile version of a page for indexing. Make sure content, links and structured data on mobile match the desktop version.

- **HTTPS.** Every page should load securely, with no mixed content warnings.

- **Structured data.** Validate your markup and fix errors. Check that it describes content actually visible on the page. See our [schema markup](/blog/schema-markup) guide for which types to use.

## How do you turn audit findings into a plan?

Score each finding by impact and effort, then fix high-impact, low-effort items first. A long list of warnings from a tool is not a plan.

1. Group findings by cause, not by URL. One template fault can produce thousands of warnings.

2. Mark which findings affect your priority pages.

3. Rate each group for impact and effort.

4. Write each fix as a specific task a developer can act on, with example URLs.

5. Recrawl after release and compare the result with your first crawl.

## Frequently asked questions

### What is a technical SEO audit?

A technical SEO audit is a review of a website's technical setup to find problems that prevent search engines from crawling, rendering, indexing or understanding its pages. It covers areas such as robots.txt, sitemaps, redirects, duplicate URLs, page speed and structured data.

### How often should you run a technical SEO audit?

A full technical SEO audit is sensible once or twice a year for most sites, with lighter checks each month. You should also audit after any migration, redesign or platform change, because these events cause most serious technical faults.

### How long does a technical SEO audit take?

The time a technical SEO audit takes depends on the size and complexity of the site. A small brochure site can be reviewed in a day or two, while a large shop with many templates and filters can take several weeks.

### Can you do a technical SEO audit without paid tools?

Yes, a basic technical SEO audit is possible with Google Search Console and PageSpeed Insights alone. A dedicated crawler makes it much quicker to find broken links, redirect chains and orphan pages across a whole site.

### What is the difference between crawling and indexing?

Crawling is when a search engine fetches a page, and indexing is when it stores that page so it can appear in results. A page can be crawled and not indexed, for example when it is a duplicate or carries a noindex tag.

A technical audit earns its keep when the fixes are released, not when the report is written. If you would like help running one or prioritising the results, [start a conversation](/contact).