Google algorithm gave me the extreme idea to really attempt to write out a irregular outline of what the formula might look like. I've taken soft plus' suggestion and given it a go using a particularly basic weight/factor expression:
GoogScore = (KW Usage Score * 0.3) + (Domain Strength * 0.25) + (Inbound Link Score * 0.25) + (User Data * 0.1) + (Content Quality Score * 0.1) + (Manual Boosts) - (Automated & Manual Penalties)
Keyword Usage Factors:
- KW in title tag
- KW in header tags
- KW in document text
- KW in internal links pointing to the page
- KW in domain and/or URL
- Registration history
- Domain age
- Strength of links pointing to the domain
- Topical neighborhood of domain based on inlinks & outlinks
- Historical use & links pattern to domain
- Age of links
- Quality of domains sending links
- Quality of pages sending links
- Anchor text of links
- Link quantity/weight metric (Pagerank or a variation)
- Subject matter of linking pages/sites
- Historical CTR to page in SERPs
- Time users spend on page
- Search requests for URL/domain
- Historical visits/use of URL/domain by users GG can monitor (toolbar, wifi, analytics, etc.)
- Potentially given by hand for popular queries/pages
- Provided by Google raters (remember Henk?)
- Machine-algos for rating text quality/readability/etc
