SegIndexer / Tiers
Google doesn't index all pages equally quickly or cheaply.
What it measures
Google doesn't index all pages equally quickly or cheaply. The SegIndexer decides which 'tier' (level) of the index a page lands in — from expensive, lightning-fast servers (for important pages) to slower, cheaper storage (for rarely needed pages). A high tier rank means: the page is quickly available when queries arrive.
Derived from
scaledSelectionTierRank — a rank value between 0 and 32,767 that reflects a mix of demand (how often is this page searched?), authority and storage economics.
Metric detail
scaledSelectionTierRank = a rank value for index-tier selection; 0-32767 is the technical 16-bit maximum (a finely resolved rank scale, not a quality value in itself). [B field, C tier logic]
Why this attribution
Authority is indirect — index-worthiness correlates with authority but does not judge content quality. The system is a 'gate' before the actual ranking: pages not in the fast tier appear more slowly in search results.
Strategic consequence
For sites with thousands of pages: weak pages occupy tier capacity that more important pages need. Active content pruning frees up capacity and improves indexing efficiency for the pages that matter — such as time-critical reports that must land in the fast tier.