Vector artwork uses a series of 'points' to describe a shape, similar to a graph in mathematics. This ensures that any vector shape at any resolution should always print sharp. Bitmap artwork is made up of blocks (pixels) that describe a shape. This means that when you zoom in, you begin to see blocks of colors and the artwork becomes unviewable. Bitmap artwork is best suited for screen use, such as websites. While it can be used for print work, it isn't ideal and should be used with caution.