Varan explains : Auditing in ServiceNow

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Auditing in ServiceNow You can enable table auditing to track changes to all or some of the table's fields. Tables : sys_audit, sys_audit_relation BRs, workflows - To prevent performance issues and infinite loops, the system skips any business rule or workflow triggered by inserts to the Sys Audit table. Enabling audit at table level - This will audit all fields on that table. Inclusion list auditing for a table - attribute - audit_type=whitelist on collection field - attribute - audit=true - this applies only to a specific subclass Exclude field from being audited - attribute - no_audit=true - all the subclasses Delete audited - system property - glide.ui.audit_deleted_tables References : https://docs.servicenow.com/bundle/tokyo-platform-security/page/administer/security/task/t_EnableAuditingForATable.html When to use audit table - https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0786168