What does the term "DSLR" mean and how does it relate to digital photography?

The term "DSLR" stands for Digital Single-Lens Reflex. It refers to a type of digital camera that uses a mirror mechanism to reflect light from the lens to an optical viewfinder. This allows photographers to see exactly what the camera sees through the lens. DSLR cameras are popular among photographers for their versatility, image quality, and ability to change lenses for different shooting situations.