Video game journalism is when people write or talk about video games for a living. Kind of like how your teacher talks to you about things in school, video game journalists talk about video games to people who want to know about them.
When video game journalists write about games, they might tell you things like what the game is about, what you do in the game, and what the game looks like. They might also tell you if the game is good or bad, if it's easy or hard to play, and if it's worth spending money on.
Sometimes video game journalists will even get to play games before they come out, so they can tell people what they think about them early. They might also interview the people who make the games, so they can learn more about how the games were created.
Overall, video game journalists help people learn more about video games and decide if they want to play them or not.