Don't worry, I'm not going to debate the merits of showing vs telling. But it's a question that comes up often on wattpad with young writers trying to improve and not understanding the principles of writing fiction. People tell them to show rather than tell, but when they ask what that means the answer is typically to write a lot of description which, in many cases, is purple prose.
The other day, I gave an explanation that several people have said helped them understand it so I thought I'd copy it here. You can agree or disagree. That's your prerogative. My goal isn't to convince you, but maybe it'll help someone.
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Telling
You're sitting in a room with someone and that person tells you what happened to him the prior day in school. He says things like: "I felt so sad when I found out..." or "I was angry when..."
Showing
Imagine a camera looking over that person's shoulder with a microphone attached (one that can even hear his thoughts). Now watch how his day went in school. The camera won't tell you he's angry. It will show his anger by his actions and words.
Showing isn't a lot of description. And there might not be a one-to-one relationship between a telling sentence and a showing paragraph like many people think. You might tell the reader the father is abusive in one sentence, but to show it right, it would take several scenes. In one scene he may be hitting his daughter and yelling at her. In another scene he may humiliate her in front of her friends. In another scene he may lock her in a closet. You never actually tell the reader he's an abusive father, but the reader will sooner or later sit up straight and say, "Damn that guy's abusive!"