The GitHub User Access Key Created detection rule monitors for the creation of SSH access keys by users on GitHub. It generates alerts whenever a new access key is created, helping organizations track and manage access permissions effectively. This rule specifically looks for audit log entries where the action corresponds to the creation of a public SSH key. The detection logic is based on GitHub audit logs categorized under 'GitHub.Audit,' indicating that it hinges on data produced during key management activities within the GitHub environment. Such monitoring is crucial for maintaining security compliance and preventing unauthorized access through potentially reused or improperly managed SSH keys.