A vizier is a very important person who works for a king, queen, or other powerful ruler. They help the ruler make big decisions, like what to do in a war or how to run the country or kingdom.
The vizier is like a helper or adviser to the ruler. They are very smart and know a lot about important things like laws, history, and politics. The ruler asks the vizier for advice and listens carefully to what they say.
Sometimes, the vizier is even more powerful than the ruler. They might be in charge of things like taxes, the army, or where to build new roads and buildings.
Overall, the vizier is a really important person who helps keep things running smoothly in a kingdom or country.