Okay kiddo, so you know how when you watch a sports game on TV, there's usually someone talking in the background telling you all about what's happening? That person is called an announcer.
But sometimes, people want to watch a game without someone talking the whole time. This is called an announcerless game.
Think of it like when you're playing with your toys by yourself. You can just focus on the game and what you're doing without someone telling you what to do or how to play.
It's the same for people watching the game - they can just focus on what's happening on the field without any extra noise or distractions. Some people really like it because they feel like they're at the game in person and can cheer and react on their own.
Does that make sense, kiddo?