Wikinews is a website where people can write news stories about what's happening in the world. Think of it like a big newspaper, but instead of just a few journalists writing the stories, anyone can write a story about an event or recent news.
When someone writes a story, other people can read it and if they see any mistakes or they want to add more information, they can edit the story. This is because Wikinews is what is called a "wiki," which is a type of website where everyone can work together to make it better.
So, if you want to know what's happening in the world, you can go to Wikinews and read stories written by people from all over the world. And if you see a story that isn't quite right, you can even help fix it!