Hey there kiddo, have you ever gone fishing before? You know how you sit by the lake or river and use a fishing rod to catch fish? Well, there's another type of fishing called trolling, but instead of catching fish, people do it to get a reaction out of others on the internet.
Trolling is when someone types a mean or insulting comment online just to see how people will react. It's a bit like teasing someone in school, but it happens on the internet, and it can be done anonymously. Someone who is trolling might say something that isn't true, just to upset others.
Now, trolling is not a nice thing to do, and most people don't like it. In fact, it can be hurtful and make others feel bad. So, it's important to always remember to be kind and respectful online, just like you would if you were talking to someone face-to-face.