Greek historiography is all about telling stories of people and events that happened a long time ago in Greece. The people who write these stories are called historians.
Think of it like a big puzzle: each historian gets little pieces, which are stories or bits of information about the past. They put all these pieces together to try to understand what really happened.
The tricky thing is that sometimes the pieces don't fit together, or they don't agree with one another. So, the job of the historian is to try to figure out what is true and what is not true, like a detective trying to solve a mystery.
The ancient Greeks were some of the first people to write down their history, and they have a lot of famous historians, like Herodotus and Thucydides. These people wrote about many different things, from wars and battles to religion and culture.
Nowadays, we still study these writings to learn about what happened in ancient Greece. It's like reading a really old, but very interesting storybook!