Irish prose fiction means stories that are made up by people from Ireland and they write these stories down in books for other people to read. These stories can be funny, sad, or even scary.
Many Irish prose fiction stories are about Ireland itself. They can tell tales of Irish legends, like leprechauns and fairies or they can be about real-life events, like the struggles the Irish people have had over the years.
Some really famous Irish authors who wrote prose fiction include James Joyce and Bram Stoker. James Joyce wrote a very famous book called "Ulysses" which is about a man named Leopold Bloom and his adventures in Dublin, which is in Ireland. Bram Stoker wrote "Dracula," a spooky story about a vampire who travels from Transylvania to England.
Irish prose fiction is important because it helps people learn about Ireland and it can also be entertaining to read.