Not like JPEGs, GIFs, and BMP images, vector graphics are not necessarily made up of a grid of pixels. Instead, vector graphics are comprised of routes, which are defined by a start and end point, along with other points, curves, and angles along the way. A path can be a line, a square, a triangle, or a curvy shape. These paths can be used to create simple drawings or intricate diagrams. Paths are even used to define the characters of specific typefaces.
Since vector-based graphics are not made up of a specific number of dots, they can be scaled to a larger size and not lose any image quality. If you blow up some sort of raster graphic, it will look blocky, or "pixelated. " When you blow up a vector graphic, the edges of each object within the graphic stay simple and clean. This makes vector graphics ideal for logos, which can be small enough to appear on a organization card, but can also be scaled to fill a billboard. Common types of vector graphics include Adobe Illustrator, Macromedia Freehand, and EPS files. Many Flash animations also use vector graphics, since they scale a great deal better and typically take up less space than bitmap images.