Use of Linux logger commands

You can view the description of the logger command in the man Manual: LogProgram-A shell command interface to the syslog (3) System Log Module. I am not very clear about how to use it. I encountered this command in the debugging program today: This command is run in the RPM installation package. To record the value of $1:

/Usr/bin/logger-t asg-rpm-spec "% pre $1"

The printed information can be recorded in/var/log/messages:

-T: mark every line in the log with the specified tag. No specific usage is found for each row in the log and the specified tag. You can give me some advice ~