First of all, let’s get the linguistic issue out of the way: That little curve in the letter ç is called a cedilla and the letter itself is pronounced as an S, so the word façade is pronounced fah-saad. The particularly pedantic among you are welcome to use the letter ç in your code, as compilers handle this just fine.1
Now, let’s learn about the pattern itself. Essentially, the best analogy I can think of is a typical house. When you buy a house, you generally care about the exterior and the interior. You are less concerned about the internals: electrical systems, insulation, ...
