How to Do a 15-Minute SEO Audit of Your Website

Most business owners have no idea how search engines see their website.

They might pay agencies hundreds of dollars a month for "SEO maintenance" without knowing if anything is actually being fixed.

You don't need expensive enterprise software to see if your site has major SEO roadblocks. You can run a basic DIY SEO Audit in 15 minutes using free tools. Here are the five key steps.

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Step 1: Check Your Index Status (1 Minute)

Before Google can rank your pages, it has to find them. If Google hasn't "indexed" your pages, they will never show up in search results.

• The Check: Go to Google and type site:yourdomain.com into the search box.
• The Results: Google will show you a list of every page it has indexed for your domain.
• What to look for:
  • No pages found? Your site is blocking crawlers (usually via a robots.txt setting).
  • Missing key pages? If your core service pages don't show up here, Google hasn't crawled them yet.
  • Strange spam pages? If you see thousands of foreign or gibberish pages, your site has likely been hacked (commonly called a "SEO spam injection").

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Step 2: Test Your Speed and Mobile Usability (3 Minutes)

Since over 60% of searches happen on mobile devices, Google indexes the mobile version of your site first. If your site is slow or hard to read on a phone, your desktop ranking will suffer too.

• The Check: Go to Google PageSpeed Insights and enter your website URL.
• What to look for:
  • Mobile Performance: Check your mobile score. If it's red (under 50), your site is actively hurting user experience.
  • Core Web Vitals: Ensure your page passes the LCP, INP, and CLS checks (aim for under 2.5s Largest Contentful Paint).

Read more about why speed is the foundation of modern SEO.

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Step 3: Audit Your Title Tags and H1 Headings (5 Minutes)

Your Title Tag and H1 tag tell Google exactly what your page is about. If these are missing or generic, Google has to guess.

• The Check: Go to your home page and look at your browser tab title.
• What to look for:
  • Home page title: Does it say "Home" or "Welcome"? If so, change it immediately. It should state your location and service, e.g. Colorado Web Design & Automation | DevMellio.
  • H1 Header: Every page should have exactly one main H1 heading containing your target service and city (e.g. <h1>Arvada Web Design Services</h1>).

For more detail on page layouts, check out our On-Page SEO Checklist Guide.

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Step 4: Scan for Broken Links and Redirects (3 Minutes)

Broken links (which lead to a 404 Not Found page) frustrate users and stop Google bots from crawling your site.

• The Check: Use a free tool like Broken Link Checker to scan your site.
• What to look for:
  • Fix any links that return 404 errors by correcting the URL or pointing them to an active page.
  • Ensure you don't have long "redirect chains" where one link bounces users through 3 or 4 different URLs before loading the destination.

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Step 5: Verify Google Search Console (3 Minutes)

Google Search Console is a free dashboard from Google that tells you exactly how many clicks and impressions you get, what keywords you rank for, and if there are any site errors.

• The Check: Go to Google Search Console.
• What to look for:
  • Performance: Check "Queries" to see what search queries are driving impressions. If impressions are high but clicks are low, you need to optimize your meta titles and descriptions to encourage clicks.
  • Indexing: Check the "Pages" report for any red error flags showing crawler issues.

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15-Minute SEO Audit Sheet

Step	Action	Tools Used	Pass / Fail
1	Index Status Check	Google Search (site:)	[ ]
2	Speed & Core Web Vitals	PageSpeed Insights	[ ]
3	Title & Headings Audit	Manual review / View source	[ ]
4	Broken Link Scan	Broken Link Checker	[ ]
5	Search Console Setup	Google Search Console	[ ]

Doing a periodic sweep of these elements keeps your site healthy and rankings stable. For a broader view of website wellness, see our Small Business Website Checklist.

If your audit revealed major speed bottlenecks, sitemap errors, or coding issues that you need resolved professionally, contact DevMellio today to discuss optimizing your search presence.