You can use the audit log reports provided with SharePoint to view the data in the audit logs for a site collection. You can sort, filter, and analyze this ...
SharePoint Online no longer has a dedicated audit log search. If you want to search for SharePoint related events, you will need to use the unified audit log.
The SharePoint audit log helps you stay on top of auditing of changes and information access events, so you can improve security and business continuity.