Relevance Ranking is Vital

Most important pages for a search should be at the top
Algorithms vary: test with real data & real searches
- Classic algorithm is"TF/IDF"
  (Term Frequency / Inverse Document Frequency)
- Vector Space
- Probabalistic
Search engine should allow admin to juggle the ranking "weights"
- relative importance of title tags
- meta keywords or other special tags
- recent dates
- special paths

Most important pages for a search should be at the top