A border guard is like a grown-up who stands at the border of a country, like the edge of a playground, making sure that nobody goes in or out without permission. They wear special uniforms and have tools like guns, walkie-talkies, and cameras to help them do their job.
In Poland, there are special people called the "Border Guard" who work together to make sure that the border between Poland and other countries is safe and secure. They make sure that only people with permission to enter Poland are allowed to enter, and they stop bad people or items from coming into the country.
When someone wants to enter Poland, they need to go through a checkpoint where a border guard will check their passport and other papers to make sure that they are allowed to enter. If the person is not allowed, the border guard can make them go back to where they came from.
Border guards also work hard to keep an eye on the border, using cameras and other equipment to make sure nobody is trying to cross illegally. They also work with other countries' border guards to share information and keep everyone safe.
Overall, border guards are important people who work hard to keep their country, like Poland, safe and protected.