Activity log
Open it: Settings → Activity log (brand admins).
A read-only audit trail of actions across your brand — who did what, and when. Entries are written automatically; nothing is created or edited by hand. Brand admins see events for their brands (plus their own sign-ins).
Columns: Event, Collection, Actor, Brand, Occurred at (with the actor’s IP/user-agent, the changes, and metadata).
It records sign-ins and sign-in failures, user and role changes, brand and market changes (including domains and status), content changes (pages created / updated / published / unpublished, revisions, styleguide, menus, media, forms), redirects, discounts, and commerce events (product, category, stock, and attribute changes). It’s the place to answer “who changed this, and when?”