An analogy to film is useful here. Sampling rate is analogous to frame rate in a movie. Videos display films at 30 frames per second. At less than 15 frames per second the motion looks choppy and unnatural. Sampling resolution is analogous to the visual quality of each individual frame of a movie.
Color film captures more information per frame than does black and white film.
The higher the quality of sound, the more space it takes to store the sound. A compact disc can store about 74 minutes of stereo sound recorded at a sampling rate of 44 kHz and a sampling resolution of 16-bits. If you reduce the quality to 22 kHz, 8-bit stereo sound, however, you can store approximately 300 minutes of audio on the same disc. When producing sound for use on the internet, therefore, one must be considerate of the user's needs and limitations. Unless you have a compelling reason to use 44 kHz, 16-bit samples, you should consider using lower quality sound samples to avoid subjecting your users to long download times.