Okay kiddo, so have you ever listened to grownups argue about which is better - chocolate or vanilla ice cream? That's kind of what an editor war is like, but instead of ice cream flavors, it's all about computer programs that help people write and edit text.
You see, there are different programs called text editors that people use to write and edit things like essays, computer code, and even this very explanation I'm giving you. Some people like one type of text editor better than others, and they can get really passionate about it.
So, when some people strongly prefer one text editor over another, they can get into what's called an editor war. They might argue online or in person about which editor is better, and why the other is worse. It's like a big fight over which ice cream flavor is the best.
Sometimes people even make jokes or memes about the editor war, because it can get pretty intense. But at the end of the day, it's really just a matter of personal preference which text editor you like the most. So don't worry too much about it - just use the text editor that works best for you!