The Zone System is a photographic technique developed by Ansel Adams and Fred Archer in the 1930s. It helps photographers understand and control exposure and development, ensuring that images capture a full range of tones from pure black to pure white. By dividing the tonal range into ten zones, from Zone 0 (black) to Zone IX (white), photographers can visualize how light and shadow will appear in their final prints. Using the Zone System, photographers can determine the best exposure settings for their scenes. By measuring the light in different areas and assigning them to specific zones, they can adjust their camera settings accordingly. This method allows for greater creative control and helps achieve the desired mood and detail in photographs.