The Sorting Begins!
Several aspiring witches and wizards are accepted into Hogwarts every year and sorted into one of four houses: Gryffindor, Ravenclaw, Hufflepuff, and Slytherin. You are assigned to a house because of your personality, and the sorting hat (who conducts the sorting) can see a person's inner being and can therefore conclude what house would bring out the best qualities a person possess.
Each house is special in it's own way, and for different reasons. Despite what other people might say about the house you are put in, it is important to understand that you were put in that house for a reason, and you should be proud of your house and defend it's honor.