Tracks the current entry source of the user to the site (e.g., from a search engine, directly).
Completes data about the time and page of the user's entry.
Records the user's first entry source to the site.
Additional information about the first entry, including URL and referrer.
Stores data about user session migrations between versions of the analytics script.
Tracks the ongoing user session and visited pages.
Collects data about the user's device and browser.
