Okay kiddo! So an officer of arms is someone who helps out with different ceremonies and events that have to do with a country or kingdom's history and traditions. They wear special outfits with colorful clothes and sometimes even have a shield or a sword.
Their job includes helping out with things like royal weddings, knightings, and other important events that happen in a kingdom. They also help out with things like genealogy, which is like a family tree that shows who is related to who in a royal family.
One of the most important things an officer of arms does is help people find out about their family history. They can help you trace back your family tree and learn about your ancestors. They can also help answer questions about all sorts of interesting things like castles, knights, and battles.
In short, an officer of arms is like a living history book and helps keep traditions and culture alive.