Marzban is actually a term that refers to a person who is responsible for guarding and protecting an important place or object. It's kind of like the security guard or protector of something that is very valuable or significant.
Let's say you have a very special toy that you love and want to keep safe. Your marzban would be the person who looks after it and makes sure no one takes it or harms it. They might stand guard at your toy box or keep it locked up somewhere safe.
In history, the term marzban was used in Persia (which is now Iran) to refer to a military commander who was in charge of defending the borders from invaders. They had an important job of making sure the country and its people were safe from harm.
So, in a nutshell, a marzban is someone who protects and guards something or someone that is important and valuable.