Beauty dishes are used for portraiture and fashion photography.
Light is bounced from the first dish into sides of the larger dish. The first dish cover the light source so there is no direct light or hot spot. So all that comes out is reflected light. The grid makes this light more directional.
Sample Video :
This honeycomb grid will fit 40cm beauty dishes, the grid directs the light in one direction so no spill.
It also comes with a shower cap type diffuser the fits over the beauty dish to give a soft light.
Have no questions.