MethodOverviewModel historyAssumptionsStatus

Status

What this site runs on, where its numbers come from, and how fresh they are.

Data sources

Confidence is stated per input. The weakest are on the hardware side, and they move the answer most. Full provenance →

Database and node

Traffic

First-party measurement, in its own database. No IP addresses, no full user-agents, no query strings — a random session id in a cookie, the path, a coarse client family and the referring host. Enough to see which pages get used and whether people click through, which is the only question being asked.

Where to next

Related pages that answer the questions this one raises.