Help:Log

A Wikipedia log is an automatically generated list of actions of a certain type, showing when they were performed, by what user, and with respect to what page or other user. Logged actions include page deletions and restorations, page moves (renames), user blocks and unblocks, page protections and unprotections, user account creations, abuse filter reports, and others.

Logs can list actions done by a user (or IP editor), actions done to a user (or IP editor), and actions done to a wiki page.