Hi @Anoop_Garg ,
AEM provides OOTB audit log mechanism for events which qualify for audit e.g. page, DAM, Replication audit. User management operation can also be logged for audit. Please refer below for more details on this
Viewing AEM Audit Log without ACS Commons (exadel.com)
Audit Log Maintenance in AEM 6 | Adobe Experience Manager
How to Audit User Management Operations in AEM | Adobe Experience Manager
In addition to this, various logs from crx-quickstart/logs folder which keeps track of audit qualifying information can be used like access, error, request, audit, history based on audit requirement.
Hope this helps