All reports, for example Site administration / ► Reports / ► Logs, should reference Usernames and course shortcodes instead of User IDs.

User IDs are not shown in the Moodle GUI anywhere else. Normal users, including site administrators, do not have access or easy knowledge of understanding what User ID correlates with which Username.
Especially those on Shared Hosting which do not have access to the database to check.

Logs should instead read the username instead of the User ID and shortcodes instead of the course ID.

For example:
"The user with id '2' viewed the course with id '1'."
Should be:
"The user 'admin' viewed the course 'Home'."

(Or perhaps, even better in course case - when it's ID '1'...
"The user 'admin' viewed the frontpage.")