Flash photography is a technique that uses a brief burst of light to illuminate a scene, making it easier to capture images in low-light conditions. This method helps freeze motion and reduce blurriness, allowing photographers to take clear pictures even in challenging lighting situations. The flash can be built into the camera or used as an external device. External flashes often provide more power and flexibility, enabling photographers to adjust the light's intensity and direction. Proper use of flash can enhance the overall quality of images, highlighting subjects and creating interesting effects.