Steelmanning is like playing a game where you try to make the other person's argument really strong and hard to defeat. It's like when you're playing with toy swords and you want to make sure your opponent has a really good sword so it's more fun to fight against.
In real life, steelmanning is when you listen carefully to someone's argument or idea and try to understand it really well. Then you think about all the possible problems with the argument and try to come up with really good solutions to those problems.
So, steelmanning is like being a superhero who tries to make everyone's arguments stronger and better. When we steelman someone's argument, we show them that we respect their ideas and want to have a fair and honest conversation with them.