I want to know the function of soft box in photography.

If the picture wants to be soft and reduce shadows, it is necessary to use as large a light source as possible. Ordinary lamps belong to point light source, and the memory perspective has shadows at all angles, and the picture is very hard. The design idea of soft box, soft cover, reflective umbrella and so on is how to turn point light source into a larger area light source.

Taking pictures in the big sun is not recommended. It is also for this reason that direct sunlight is easy to produce shadows. When there are thin clouds covering the sun or cloudy days, the light will become soft, because the clouds cover the sun at this time, which is equivalent to a big soft box.

Good luck!