What Is a Website Audit — and Why Does Your Site Need One?

A website audit is a comprehensive health check for your site. It examines everything from technical SEO and page speed to accessibility and security — giving you a clear picture of what's working, what's broken, and what's costing you traffic and conversions.

Most websites accumulate problems silently. A misconfigured redirect here, a missing alt attribute there, a slow-loading hero image. Each issue on its own seems minor. Together they compound into a site that frustrates users, confuses search engines, and quietly bleeds potential revenue.

What a Website Audit Actually Checks

A thorough audit covers several distinct layers of your site:

1. Technical SEO

Search engines need to be able to crawl, index, and understand your content. Technical SEO issues prevent that:

• Broken internal links — Pages that 404 or redirect multiple times waste crawl budget and signal poor maintenance to Google.
• Missing or duplicate meta tags — Every page needs a unique <title> and <meta name="description">. Duplicate titles confuse search engines about which page to rank.
• Canonical issues — Without proper rel="canonical" tags, your own pages can compete against each other in search results.
• Missing structured data — Schema markup helps Google understand your content type and can unlock rich results (star ratings, FAQ dropdowns, etc.).

2. Performance

Page speed is a confirmed Google ranking factor — and it directly impacts conversions. Amazon famously found that every 100ms of latency cost them 1% in sales.

Google's Core Web Vitals are the key performance metrics to target:

• Largest Contentful Paint (LCP): How quickly the main content loads. Target under 2.5 seconds.
• Cumulative Layout Shift (CLS): How much the page jumps around while loading. Target under 0.1.
• Interaction to Next Paint (INP): How responsive the page is to user input. Target under 200ms.

3. Accessibility

One in four adults in the US has a disability. Accessibility isn't just a legal obligation — it's good design. WCAG 2.1 AA compliance means your site works for people using screen readers, keyboard navigation, or those with low vision.

Common accessibility failures include missing form labels, insufficient colour contrast, images without alt text, and interactive elements that can't be reached by keyboard.

4. Security

Security headers protect your users from common attacks. An audit checks for:

• Content Security Policy (CSP) — Limits which scripts can run on your site, reducing XSS risk.
• HTTPS enforcement — All resources should load over HTTPS, with HSTS headers to prevent downgrade attacks.
• Cookie security flags — Sensitive cookies should have Secure and HttpOnly attributes.

5. Broken Links

Broken links (404 errors) damage user experience and waste crawl budget. They often appear when you rename pages without redirecting the old URLs, or when external sites you've linked to go down.

6. Content Quality

Thin or duplicated content is actively penalised by Google. An audit checks:

• Pages with very low word counts (under 300 words often struggle to rank)
• Near-duplicate content across multiple URLs
• Keyword stuffing or unnatural content patterns

How Often Should You Run an Audit?

For most sites, a monthly automated scan is the right cadence. This catches regressions before they compound — a new deploy might accidentally break your sitemap, or a CMS update might remove canonical tags.

Weekly scans are worth it if you publish frequently or have a large e-commerce catalogue where product pages, filters, and faceted navigation create constant SEO risk.

What to Do With Audit Results

Prioritise by impact:

1. Fix broken links and 404s first — These are easy wins that improve both user experience and crawl efficiency.
2. Address Core Web Vitals failures — These directly affect rankings and conversion rates.
3. Fix accessibility errors — P0 accessibility failures (missing keyboard access, broken screen reader flow) can expose legal liability.
4. Work through SEO issues — Missing meta tags, canonical errors, and missing structured data can be batched and addressed systematically.

The goal isn't a perfect score — it's a continuously improving site. A website audit is most valuable when it becomes a regular habit rather than a one-off event.

Related Checks

Explore the specific checks Rocket Vitals runs for each audit category:

• Missing page title — Every page needs a unique title tag for SEO
• Broken link — Links returning 4xx or 5xx errors waste crawl budget
• Missing CSP header — Content-Security-Policy protects against XSS
• Slow Largest Contentful Paint — LCP is Google's primary loading speed metric
• Images missing alt text — Alt text is essential for accessibility and SEO
• Missing llms.txt — AI search engines use llms.txt to understand your site

Rocket Vitals runs all of these checks in one scan, across up to 500 pages, with a scored report you can share with your team or clients. Run a free scan →