Application events can be centrally logged in the application log. The advantage is system-wide standardized and uniform event logging, which is convenient to analyze.
Several different logs (for various objects) can be written at the same time by an application.
The application log is, in principal, similar to the system log. Whereas system event information is logged in the system log, relevant application events should be captured in the application log.
The application log can also be used as a message collector.