Okay kiddo, so you know how sometimes groups of people have symbols or flags to represent themselves? Well, sometimes groups of people who believe in socialism have their own symbols and flags too, and that's called socialist heraldry.
Socialism is a type of belief where people think that everyone should have equal opportunities and resources, and that important things like schools, hospitals, and other services should be owned by everyone together, instead of by one person or company. So people who believe in socialism might want to have a special symbol or flag to represent their values and beliefs.
Socialist heraldry usually includes things like symbols that represent workers or people, like hammers or stars, and colors like red that represent things like the bravery and hard work of workers. Some socialist heraldry also has pictures of important people in history who supported socialist ideas, like Karl Marx or Vladimir Lenin.
So basically, socialist heraldry is just a way for people who believe in socialism to have a special symbol or flag that represents their beliefs and values.