Anglo-Norman literature is a type of writing that was popular a long time ago, during the medieval period in Europe.
So, a long time ago, there were people who spoke two different languages: English and Norman. Norman is the language of the people who lived in a place called Normandy, which is in France. These two groups of people started to mix together and create a new language. This new language was called "Anglo-Norman."
People who knew how to write started making stories and poems in this new language. These stories and poems were very different from the ones before because they mixed together ideas and styles from both English and Norman cultures.
Anglo-Norman literature was often about kings, knights, and battles. It also included stories about love and adventures. Some of the most famous stories from this time are about a knight named King Arthur and his knights of the round table.
So, basically, Anglo-Norman literature is a type of writing that was popular a long time ago and it mixed together two different languages and cultures to create new stories and poems about knights, battles, and adventures.