What is Kill -12 in UNIX?

In UNIX, the kill command is used to send signals to processes, with -12 specifically representing the SIGUSR2 signal. This signal is user-defined and can be handled by processes to perform custom actions, as defined by the program. Unlike standard signals like SIGTERM or SIGKILL, SIGUSR2 is not typically used for terminating processes but is often utilized for inter-process communication or to trigger specific behaviors within an application.