What Gets Checked
Meta Information（30%）
Title/description length, noindex, canonical, language attribute, character encoding, viewport, favicon, OGP, DOCTYPE, URL structure
Page Quality（25%）
Body text length, text-to-HTML ratio, image alt attributes, structured data, frames, emphasis tag usage, HTTPS support
Heading Structure（15%）
Presence and count of H1, number of headings, skipped heading levels, empty headings
Link Structure（15%）
Internal/external link counts, anchor text, nofollow ratio. Can also check for broken links on the page
Server Settings（15%）
HTTP status, number of redirects, response time, HTML size, compression, HTTP version