The three settings that determine camera exposure are: Shutter speed, aperture and ISO speed.

Shutter speed is the amount of time that light is allowed to enter the camera lens. Aperture controls the area that light can pass through the camera lens. ISO speed is how sensitive the camera will be to light that will be entering.

As an image; the motion of an object (or objects) will either appear blurry or frozen depending on the shutter speed, the image will have a shallow depth of field or large depth of field depending on the aperture and the brightness of the photo depends on the ISO speed.