.jpg: Have a resolution of 72 DPI (dots per inch). These are used for on-screen communications such as the Web site and electronic presentations.
.tif: Have a resolution of 300 DPI and are for printed documents. The .tif is one of the most flexible image file types in terms of compatibility across various systems and programs.
.eps (Adobe Illustrator): Vector graphis (all straight lines, no pixels) and are most commonly used for printed documents.
