If you've ever had to explain vector v bitmap to a client

Digital images can usually be divided into two distinct categories. As a general rule bitmaps are typically used to depict lifelike images whereas vector graphics are more often used for abstract images such as logos.

Below you see an image and to the right a 400 percent enlargement of a section.

The image with the enlargement shows one of the main disadvantages of bitmap images: once they are enlarged too much, they become blocky and unsharp.

Vector graphics are images that are completely described using mathematical definitions.

A vector graphic is made of a number of points with lines interconnecting all of them, smooth forms are created using so called bezier curves.

Vector files are saved in EPS file format which includes a bitmap preview image along with the bezier data.

Digital files can be saved in a wide variety of file formats. Among these are:

EPS: a flexible file format that can contain both bitmap and vector data.
PDF: versatile file format that can contain just about any type of data including complete pages
GIF: bitmap, mainly used for internet graphics
JPEG: bitmap mainly used for internet graphics
TIFF: a popular and versatile bitmap file format