Finding the right room in a shared apartment (WG-Zimmer) is not exactly easy because they are scarce and in high demand in university cities. There are often many people vying for the room, and you have to be prepared to go through an "audition" for it. It's a kind of informal interview in which the other members of the apartment want to discover whether you would be a good fit. You should be prepared to answer questions about whether you're willing to clean, what your music tastes are, and what your daily routine is.