Okay, so let's say you and a bunch of your friends are playing a game together. In this game, you need someone to be in charge and make rules to make sure everything runs smoothly. So, you pick someone to be the "boss" of the game.
In Bulgaria, there are lots of cities and towns that are kind of like a big game, and they need someone to be in charge too! But instead of one person, they have a whole group of people called the municipality.
The municipality is made up of a group of people who are elected by the citizens of the city or town. These people are called councillors, and they work together to make rules and decisions for their municipality.
Each municipality in Bulgaria is responsible for things like maintaining roads and buildings, handling waste and recycling, providing public transportation, and regulating businesses. They also make decisions about things like taxes and funding for local projects.
So, if you live in a city or town in Bulgaria, you are part of a municipality, and the councillors in that municipality are working hard to make sure everything runs smoothly for you and your neighbours. Just like how your boss in your game is making sure everyone plays fairly!