Installing the tracking snippet, reading the two visitor lists, filtering them, and using heatmaps.
Add a domain, paste one script tag, and verify that events are arriving.
People the snippet matched to a real person — one row per human, merged across their devices.
Sessions the snippet saw but could not attach to a person — one row per browser profile.
Every filter option, and the OR/AND rule that decides how they combine.
Four overlay layers painted on your real site, for everyone or for one person.
Identified counts people, Anonymous counts browsers. Adding them together is meaningless.