Proletarian literature is a type of writing that talks about the lives of working-class people. The word "proletarian" means "worker" in Latin.
So, basically, it's stories and books written by people who come from a working-class background and are interested in telling the stories of other working-class people. They want to show what it's like to be a worker in society, and how hard it can be sometimes.
Proletarian literature started to become popular in the 1920s and 1930s, when people were struggling during the Great Depression. Writers wanted to use their words to help fight against the inequalities in society and improve the lives of workers.
Some examples of proletarian literature include "The Grapes of Wrath" by John Steinbeck, "Native Son" by Richard Wright, and "Maggie: A Girl of the Streets" by Stephen Crane.
Overall, proletarian literature is about telling the stories of the workers and giving them a voice. It's about showing the hardships and struggles of the working-class, and creating empathy for their experiences.