Audit log
A record of the consequential things that happened in your workspace, readable by owners.
The audit log records the events an administrator needs after the fact: members invited and removed, roles changed, connectors added and revoked, and changes to company-level settings.
Find it under Settings → Audit log.
Owners only
Reading the audit log requires the owner role.
A member who opens the page gets the page and an honest refusal rather than a 404. Pretending the screen does not exist would be a worse answer: they can see it in the navigation, and telling them "this is owner-only" is the truthful one.
What is in an entry
Each entry records what happened, who did it, and when. Events are recorded as they occur and are not editable by anyone, including owners.
What it is not
It is not a plan history. Changes to a plan's Specs live in the plan itself and in its conversation, which is a better record of why something changed than an event row would be.
It is not a login log. Authentication is handled by your identity provider, and its own logs are the place to answer questions about sign-ins.