What is vector artwork?
Vector artwork, also known as "draw graphics," are the preferred file type used for printing. The simplest way to explain vector files is that they are type of image that uses infinitely small lines to outline the actual artwork, allowing the image to be scaled or modified without loss of image quality or resolution. That way, when you stretch to image out to fit into a large imprint area, the artwork doesn't become blurry or pixelated.
The most common file types for this type of artwork is .ai, or .eps. If the image is created in Adobe Illustrator, it is most likely a vector graphic. While images created in Adobe Photoshop or another "pixel" based program, renders bitmap or rastor graphics.