An electoral district is kind of like a big puzzle piece that helps people vote for what they want in their area. Imagine you and your friends are playing a game and you need to divide into teams. One way to do this would be to draw lines on the ground so that each team stays in their own area. This is a bit like how electoral districts work. They're lines that divide up an area so that people who live near each other vote for the same things.
When elections come around, people get to vote for the person or group that they want to represent them in their area, which is also called a constituency. The person who wins the most votes in that area becomes the representative for everyone who lives there. So, if you live in an electoral district that loves unicorns, you might vote for a person who promises to make more unicorn parks.
Electoral districts are important because they give everyone an equal chance to be heard. Some areas might have different ideas about what they want, and electoral districts make sure that each area's voice is heard. It's important for the people who run the country to know what everyone wants, and electoral districts help them do that.