What is the difference between SIGSTOP and SIGTSTP?

Question

Just wondering about the difference between SIGSTOP and SIGTSTP signals.

Answer 1

/usr/include/x86_64-linux-gnu/bits/signum.h

#define SIGSTOP     19  /* Stop, unblockable (POSIX).  */
#define SIGTSTP     20  /* Keyboard stop (POSIX).  */