What is the purpose of a flash in photography?

The purpose of a flash in photography is to produce a flash of artificial light, which is particularly useful in low-light conditions or when the subject is backlit. Flash helps illuminate the subject, reducing motion blur and creating a sharper image. It can also help to freeze motion. Additionally, flash can balance exposure between illuminated and shadowed areas in a scene, ensuring that details are visible and the overall image is well lit.

In photography, the function of a flash goes beyond merely adding light; it can also contribute to the overall dynamics of the image, enhancing clarity and detail where natural light may not suffice.