Imagine you are staying in a big hotel, and you don't know where to go or what to do in the city. So, you go to a special desk in the hotel lobby called a "concierge" desk. The person who sits at that desk is called a concierge.
A concierge is kind of like a superhero who can help you with anything you need while staying in the hotel. They know the city very well, and they can suggest exciting things to do, places to eat, and places to shop. They can also help you book a taxi, reserve a table at a restaurant, or buy tickets to a show.
Think of the concierge like your very own magical guide who can make your stay at the hotel much better. They are always happy to help you with anything you need, and they know many tricks to make your experience unforgettable. So, if you're ever in a hotel and you need some help, just go to the concierge desk, and they will take care of everything.