Serilog defines several levels of log events. From low to high, these are Verbose, Debug, Information, Warning, Error and Fatal.
| Level | Usage |
|---|---|
Verbose |
Verbose is the noisiest level, rarely (if ever) enabled for a production app. |
Debug |
Debug is used for internal system events that are not necessarily observable from the outside, but useful when determining how something happened. |
Information |
Information events describe things happening in the system that correspond to its responsibilities and functions. Generally these are the observable actions the system can perform. |
Warning |
When service is degraded, endangered, or may be behaving outside of its expected parameters, Warning level events are used. |
Error |
When functionality is unavailable or expectations broken, an Error event is used. |
Fatal |
The most critical level, Fatal events demand immediate attention. |
Default Level – if no MinimumLevel is specified, then Information level events and higher will be processed.
References
https://github.com/serilog/serilog/wiki/Configuration-Basics