# (0) Introduction ###### tags: `session-3-chunkified` What makes a dataset useful? In what contexts can data be used to advance an idea and when should be wary of the limiations of using certain data? How should we consider the information given by the data providers? In this Session, we’ll cover these questions by introducing the concept of “metadata.” We will then provide more resources for those looking to take their mapping skils to the next level, and do a fun, in-class mapping exercise.