How to Do an SEO Audit of Your Site in 30 Minutes

Run a complete SEO audit of your site in just 30 minutes. With a step-by-step checklist and free tools.

By Richard Castro · March 28, 2026 · 10 min read

Why You Need an SEO Audit

An SEO audit is like a medical checkup for your website. It shows you what works, what's broken, and what you can improve. Without one, you're optimizing blindly.

How often? At least every 3 months, or after any major change to your site (redesign, migration, CMS switch).

This guide lets you do a complete audit in 30 minutes using free tools. No technical experience needed.

Minute 0-5: Indexing and Crawling

Check How Many Pages Google Has Indexed

Type in Google: site:yourdomain.com

The number of results tells you how many pages Google has indexed. Compare it with the actual number of pages on your site:

| Situation | Problem | Action | |---|---|---| | Google indexes more than you have | Duplicate content or junk pages indexed | Add noindex to unnecessary pages | | Google indexes fewer than you have | Crawling or indexing issues | Check GSC > Pages | | Numbers are similar | All good | Continue |

Check Google Search Console > Pages

In GSC, go to Pages (or Indexing > Pages):

• Not indexed (excluded): Review why. Some exclusions are normal (pagination, parameters), others aren't.
• Errors: Any page with an error needs immediate attention.
• Valid with warnings: Check if the warnings are relevant.

Check robots.txt

Go to yourdomain.com/robots.txt and verify:

• You're not blocking important pages
• The sitemap is declared
• There are no overly broad Disallow rules

Minute 5-10: Speed and Core Web Vitals

Speed Test

Go to PageSpeed Insights and analyze your home page and 2-3 important pages.

Key metrics:

| Metric | Good | Needs improvement | Poor | |---|---|---|---| | LCP (Largest Contentful Paint) | < 2.5s | 2.5-4s | > 4s | | INP (Interaction to Next Paint) | < 200ms | 200-500ms | > 500ms | | CLS (Cumulative Layout Shift) | < 0.1 | 0.1-0.25 | > 0.25 |

Common Speed Problems and Quick Fixes

| Problem | Impact | Solution | |---|---|---| | Unoptimized images | High | Convert to WebP, compress, lazy loading | | Unminified JavaScript | Medium | Minify and defer non-critical scripts | | No browser caching | Medium | Configure Cache-Control headers | | Heavy web fonts | Low-Medium | Use font-display: swap, preload | | Unused CSS | Low | Purge unused CSS |

Minute 10-15: On-Page SEO

Review Your Most Important Pages

Select your 5 highest-traffic pages (find them in GSC > Performance > Pages) and check each one:

Title tag:

• [ ] Does it include the main keyword?
• [ ] Is it under 60 characters?
• [ ] Is it compelling enough to click?
• [ ] Is it unique (not repeated on other pages)?

Meta description:

• [ ] Is it under 155 characters?
• [ ] Does it include the keyword or synonym?
• [ ] Does it have a clear CTA or benefit?

Headings (H1, H2, H3):

• [ ] Is there only one H1 per page?
• [ ] Does the H1 include the main keyword?
• [ ] Do H2/H3s follow a logical hierarchy?
• [ ] Do subheadings cover user questions?

Content:

• [ ] Does it match the search intent?
• [ ] Is it more comprehensive than top 3 competitors?
• [ ] Does it have images with descriptive alt text?
• [ ] Is it up to date (no obsolete information)?

Detect Duplicate Content

Search Google: site:yourdomain.com "exact phrase from your content"

If the same phrase appears on multiple pages, you have duplicate content. Solutions:

• Consolidate pages with canonical tags
• Remove duplicate content
• Rewrite to make each page unique

Minute 15-20: Internal Links

Review Internal Link Structure

Internal links distribute your site's authority and help Google understand relationships between pages.

Common problems:

| Problem | How to detect | Solution | |---|---|---| | Orphan pages | Pages with zero internal links | Add links from related pages | | Pages too many clicks from home | More than 3 clicks to reach | Reorganize structure or add direct links | | Generic anchor text | "click here", "read more" | Use descriptive anchor text with keywords | | Broken links | Audit tool or GSC | Fix or redirect |

The 3-Click Rule

Any important page on your site should be accessible in a maximum of 3 clicks from the homepage. If you need more, your structure is too deep.

Minute 20-25: Content Analysis

Identify Underperforming Content

In GSC, look for pages with:

• 0 clicks in the last 3 months: Content providing no SEO value
• High impressions but 0 clicks: Title/meta description problem — learn how to improve your CTR in Google Search Console to turn impressions into traffic
• Position > 20 with no improvement trend: Content Google doesn't value

What to Do with Underperforming Content

| Option | When to use it | |---|---| | Update | Topic is still relevant but content is outdated | | Merge | You have 2-3 articles on the same topic (cannibalization) | | Delete | Content is irrelevant and adds nothing | | Redirect | You delete a page but want to pass its authority to another |

Check Content Freshness

Google values updated content, especially for informational search intent. Check:

• Do your main articles have the current year or updated references?
• Are there data, statistics, or tools mentioned that no longer exist?
• Do external links still work?

Minute 25-30: Mobile and UX

Mobile Usability Test

In GSC, go to Experience > Mobile Usability. Most common issues:

• Text too small to read
• Clickable elements too close together
• Content wider than the screen
• Viewport not configured

Check Basic User Experience

Open your site on mobile and navigate like a real user:

• [ ] Does the page load in under 3 seconds?
• [ ] Does the menu work correctly?
• [ ] Can you read content without zooming?
• [ ] Are CTAs visible and clickable?
• [ ] Are there intrusive pop-ups?

Complete SEO Audit Checklist

Indexing and Crawling

• [ ] Check indexed pages with site:yourdomain.com
• [ ] Review errors in GSC > Pages
• [ ] Verify robots.txt
• [ ] Check sitemap.xml

Speed

• [ ] Pass PageSpeed Insights test
• [ ] LCP < 2.5 seconds
• [ ] CLS < 0.1
• [ ] INP < 200ms

On-Page (top 5 pages)

• [ ] Optimized title tags (< 60 chars, with keyword)
• [ ] Optimized meta descriptions (< 155 chars)
• [ ] One H1 per page
• [ ] Correct H2/H3 hierarchy
• [ ] Images with alt text
• [ ] No duplicate content

Internal Links

• [ ] No important orphan pages
• [ ] 3-click rule met
• [ ] Descriptive anchor text
• [ ] No broken links

Content

• [ ] Identify underperforming content
• [ ] Plan to update, merge, or delete
• [ ] Main content updated

Mobile and UX

• [ ] No mobile usability errors in GSC
• [ ] Smooth mobile navigation experience
• [ ] No intrusive pop-ups

After the Audit: What to Fix First

Prioritize issues by impact and ease:

| Priority | Problem type | Example | |---|---|---| | 1 (urgent) | Indexing errors | Important pages not indexed | | 2 (high) | Critical speed | LCP > 4 seconds | | 3 (medium) | On-page for top pages | Titles without keyword | | 4 (normal) | Underperforming content | Articles with 0 traffic | | 5 (low) | Incremental improvements | Optimize alt text, anchor text |

Don't try to fix everything at once. Start with urgent issues and work down. A monthly 30-minute audit is more effective than an annual 8-hour one. To go further, you can use AnalySEO to connect your Google Search Console data and spot these issues automatically — for free.