How to Run an SEO Audit on Your Own Website (Step by Step)

You don't need expensive software or a consultant to find out what's wrong with your website's search performance. An SEO audit is a structured checkup — the kind of thing a doctor would call a "routine physical" — and you can do one yourself in about an hour. All you need is a browser, a few free tools, and the willingness to look at your site the way Google does.

Most small-business owners treat SEO like a mystery. It isn't. Google publishes exactly what it wants. The hard part isn't knowing the rules — it's making sure your site actually follows them. That's what an audit catches.

What an SEO Audit Actually Is

An SEO audit is the process of evaluating how well your website aligns with search engine best practices. It checks the technical foundation, the content, and the off-page signals that determine whether Google (and other search engines) can find, understand, and trust your pages.

Think of it this way: you could have the best product in the world, but if your storefront sign is misspelled, the front door is stuck, and nobody's ever heard of you, nobody's walking in. An SEO audit spots those three categories of problems — visibility, accessibility, and authority — before they cost you customers.

Why You Need One

Search engines update their algorithms constantly. A site that ranked perfectly in January might be losing ground by September, and you wouldn't know until traffic dropped. Running an audit on a regular schedule — quarterly is a good rhythm for most sites — catches problems early. It also gives you a baseline so you can measure whether changes you make are actually working.

Even brand-new sites benefit. Setting up SEO correctly from the start saves you from having to fix hundreds of issues later. If you're about to launch or recently launched, an audit now is an investment that pays compound interest.

Step 1: Check Your Title Tags

Open your homepage and any five inner pages. Right-click and select "View Page Source." Search for <title>. Every page on your site should have a unique, descriptive title tag between 50 and 60 characters. The primary keyword for that page should appear near the beginning.

Common problems: titles that are too long (they get cut off in search results), titles that are identical across multiple pages, or titles that say something generic like "Home" or "Welcome." If you find any of these, rewrite them. The title is the single most important on-page SEO element — it shows up as the clickable link in search results and directly influences whether someone visits your page.

Step 2: Review Your Meta Descriptions

In the same page source, look for <meta name="description". This is the short paragraph that appears under your title in search results. Google doesn't use it as a direct ranking factor, but it heavily influences click-through rate, which does affect rankings indirectly.

A good meta description is 120 to 155 characters, includes your target keyword naturally, and tells the searcher exactly what they'll get on the page. Avoid leaving it blank — Google will auto-generate one, and it's usually mediocre. Avoid stuffing it with keywords, which looks spammy and reduces trust.

Step 3: Scan Your Headings

Every page should have exactly one <h1> tag that clearly describes the page topic. Use <h2> and <h3> tags to break content into logical sections. Headings aren't just visual styling — they're structural signals that help search engines understand content hierarchy.

A quick check: use a free tool like SEO Header Tags Checker (just Google it) or inspect your page source. If a page has no <h1>, or has five of them, that's a problem to fix. Your headings should read like a table of contents — someone scanning just the headings should understand what the page covers.

Step 4: Inspect Image Alt Text

Right-click on any image and select "Inspect" (or "Inspect Element"). Look for the alt attribute. Every meaningful image should have descriptive alt text. This isn't just an SEO signal — it's also how screen readers describe images to visually impaired users, so it's an accessibility requirement.

What to look for: empty alt attributes (alt="" is fine for purely decorative images like background textures, but not for product photos or informational graphics), alt text that's just a filename like "IMG_3847.jpg," or alt text that's a paragraph long. Keep it concise — one to two sentences that describe what the image shows and, if relevant, include a keyword naturally.

Step 5: Test Page Speed

Go to PageSpeed Insights (pagespeed.web.dev) and enter your URL. Google will analyze both the mobile and desktop versions of your page and give you a score out of 100, along with specific recommendations.

Pay attention to three metrics: Largest Contentful Paint (how fast the main content loads), Cumulative Layout Shift (how much the page jumps around as it loads), and Interaction to Next Paint (how responsive the page feels). If your mobile score is below 50, that's urgent — most searches now happen on phones, and Google uses mobile-first indexing.

Common speed killers: unoptimized images (compress them with tools like Squoosh), too many third-party scripts (analytics widgets, chat popups, social embeds), no browser caching, and slow hosting. Each of these has a straightforward fix.

Step 6: Check Mobile-Friendliness

Google's Mobile-Friendly Test (search "Google Mobile-Friendly Test") checks whether your pages work well on small screens. But honestly, the easiest test is to grab your phone and try to use your own site. Can you read the text without zooming? Are buttons big enough to tap? Does the menu work? Does anything overflow off the screen?

If your site uses responsive design (most modern themes do), you're probably fine on the basics. But check for elements that don't translate well — horizontal scrolling, tiny fonts, or form fields that are impossible to tap on a phone screen.

Step 7: Find Broken Links

Broken links hurt both user experience and crawlability. Use a free tool like Broken Link Checker or Screaming Frog's free version (up to 500 URLs) to scan your site for 404 errors.

For each broken link, you have three options: redirect it to a relevant existing page (best), fix the URL if it was a typo, or remove the link entirely if the destination no longer exists. Pay special attention to broken links on high-traffic pages — those are costing you the most.

Also check your internal links. A well-linked site helps search engines discover all your pages and understand which ones are most important. If a page has zero internal links pointing to it, it's essentially invisible to crawlers.

Step 8: Verify Schema Markup

Schema markup (also called structured data) is code you add to your pages that helps search engines understand your content type — whether it's an article, a product, a local business, an FAQ, or something else. When done correctly, it can earn you rich results in search: star ratings, FAQ dropdowns, recipe cards, event listings, and more.

Use Google's Rich Results Test (search.google.com/test/rich-results) to check whether your pages have valid schema. Common issues: missing schema entirely, incorrect types (using "Organization" when "LocalBusiness" would be more appropriate), or syntax errors that prevent Google from reading the markup.

Step 9: Examine Your Sitemap and Robots.txt

Every website should have a sitemap (usually at yourdomain.com/sitemap.xml) and a robots.txt file (at yourdomain.com/robots.txt).

Your sitemap should list all the important pages on your site — not every URL, but every page you want search engines to index. If it's missing, that's a problem. If it exists but contains pages that return errors or redirect chains, that's also a problem.

Your robots.txt file tells crawlers which pages to skip. A common mistake is accidentally blocking your entire site with a misconfigured rule. Check that your robots.txt doesn't disallow your CSS, JavaScript, or image directories — Google needs those to render your pages properly.

Also make sure you've submitted your sitemap to Google Search Console. If you haven't set up Search Console yet, do it now — it's free and gives you direct insight into how Google sees your site.

Step 10: Interpret Your Results

After going through these steps, you'll have a list of issues. Not all of them are equally urgent. Prioritize like this:

1. Critical: Pages not indexed, site blocked by robots.txt, security issues (mixed content, no HTTPS). Fix these today.
2. High priority: Missing title tags, slow page speed, broken links on high-traffic pages. Fix within a week.
3. Medium priority: Missing alt text, weak meta descriptions, missing schema markup. Fix within a month.
4. Low priority: Minor heading inconsistencies, slight page-speed improvements, additional internal linking. Ongoing improvements.

The goal isn't perfection on day one. It's identifying the biggest gaps between where you are and where you should be, then closing them systematically.

How Often Should You Audit?

For most websites, a full audit every three months is ideal. Run a lighter check monthly — verify that no new broken links have appeared, that page speed hasn't regressed, and that new content has proper on-page SEO. After any major site update (new theme, migration, redesign), do a full audit immediately.

If you're a small business with fewer than 20 pages, you can get away with semi-annual audits. If you're publishing content regularly or running an e-commerce store with hundreds of product pages, quarterly is the minimum.

The Bottom Line

An SEO audit isn't a one-time event — it's a maintenance habit. The sites that consistently rank well aren't necessarily the ones with the biggest budgets. They're the ones that regularly check their own work and fix problems before they compound. You now have every step you need to do that yourself. Start with your homepage, work through the list, and fix what you find. Your future search rankings will thank you.