Theoretically, digital cameras with higher resolutions can create sharper and larger print photographs. However, high-resolution cameras don't automatically yield high-quality photos, because many factors contribute to photo quality, such as lens quality, shutter speed, and external lighting.
In a listing of digital camera specifications, you'll probably see two resolution measurements: Overall and effective. Effective pixels, or effective resolution, is the more useful number.
Resolution also refers to the sharpness of the image displayed on the LCD screen of a digital photo frame. The number of pixels used to create the LCD screen equal the resoluton of the digital photo frame. A frame with a higher resolution number should be able to display images with more sharpness than a frame with a lower resolution number.