Okay, let's break this down. When you don't understand a term...ask us what it means, or google it. When you imply that someone wasn't speaking English (when they wrote eloquently in English)...it is rude (that was how I took it). You have the best site available to you (BYC) with kind, knowledgeable people here to help you. Keep that in mind. Also, I would recommend going back to the post where you listed your age and edit in the word "youth". As a mom, I would not want my kids posting their age on any site, family friendly or not. Keep asking your questions here, but try to specify what you are asking. When you said "in English", no one would be able to know what you needed clarity on. I will reiterate...READ, READ, READ! We are all still learning, and have questions. You will get there, and pretty soon will be a pro!
The crest is the top of the head (an ornamental tuft/projection on the head). Silkies have it, Polish chickens have it...