To demonstrate the applications of the Façade pattern, let's take an example that we'd have experienced in our lifetime.
Consider that you have a marriage in your family and you are in charge of all the arrangements. Whoa! That's a tough job on your hands. You have to book a hotel or place for marriage, talk to a caterer for food arrangements, organize a florist for all the decorations, and finally handle the musical arrangements expected for the event.
In yesteryears, you'd have done all this by yourself, for example by talking to the relevant folks, coordinating with them, negotiating on the pricing, but now life is simpler. You go and talk to an event manager who handles this for you. S/he will make sure that they talk to the individual service providers and get the best deal for you.
Putting it in the Façade pattern perspective:
Client: It's you who need all the marriage preparations to be completed in time before the wedding. They should...