Color slides are used mainly for projection or viewing in hand-held viewers, but you can also use them to make color prints and enlargements, or have them transferred to video tape. Color slides are also less expensive, since no printing stage is involved. If your primary interest is in giving slide shows, use color slide films. Each type of film also has technical characteristics that may make one or the other better in a given situation. Color slide films, on the whole, are more contrasty and can therefore add more snap to dull or low-contrast scenes.
Correct exposure is also much more critical with color slide films.
Color negative films, on the other hand, can record a wider contrast range and allow greater room for exposure error. They produce prints with rich, vibrant colors. Their wide exposure latitude makes them excellent general-purpose films that work equally well in SLR cameras and simple 35 mm cameras that lack exposure controls. They are designed for use with SLR cameras whose metering systems expose film precisely. Full description of Kodak consumer color films for 35 mm cameras.