what is the po300 code mean on 2002 Pontiac Grand Prix GTP

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
What is said on the machine was it was a random misfire
(1) Answer
Random misfire is when different cylinders misfire at different times.
Some times you can feel it misfire and sometimes you can't.

Most of the times a tune up will solve the problem.