Our comprehensive audit checks 40+ critical SEO factors:
**Content & Meta Tags:**
- Title tag optimization
- Meta description
- H1 tag presence
- Meta keywords
- Meta viewport
- Meta charset
- Language attribute
- Meta robots
- Header robots
**Technical SEO:**
- 404 page check
- robots.txt validation
- Favicon presence
- Response time analysis
- Page size optimization
- DOM size check
- Doctype declaration
- Deprecated HTML tags
- Server tag inspection
- Server compression
- Valid SSL certificate
- Secure URL (HTTPS)
- HTTP/2 enabled
- Canonical URL
- SEO-friendly URL structure
**Performance:**
- Page load speed
- Server response time
- HTTP requests count
- Image formats optimization
- Lazy loading images
- Non-deferred JavaScript
- Inline CSS detection
**Content Quality:**
- Words count
- Top used words analysis
- Text to HTML ratio
- Plaintext emails detection
**Links & Structure:**
- Internal links analysis
- External links review
- Unsafe external links detection
- Social media links
**Images & Media:**
- Image alt attributes
- Image formats optimization
- Lazy loading implementation
**Other Critical Checks:**
- Open Graph tags
- DNS records
- SSL certificate validity
- And more...