A flash diffuser spreads the light from the flash of a camera. In Effect, the light will not come from one concentrated source (Like a spotlight), but rather will spread out and thus getting rid of harsh light and hard shadows.
This is particularly usEFul for portrait photography since harsh light and hard shadows are generally considered unflattering in a portrait. This flash diffuser is designed to create a soft and flattering lighting. It can be attached to or removed from the flashgun in seconds.