Neutral density filters are indispensable in photography. They're used all the time, especially in landscape photography. You know those great pictures with flowing water that looks so "fluffy" and soft – for something like that, you need a neutral density filter.

A neutral density filter, or "ND filter" (neutral density filter), absorbs the light, allowing you to use longer exposures. This long exposure and the movement of the water make it look so beautiful.
By shooting with a neutral density filter, the incoming light is darkened, making it easier to photograph in very bright environments.
Conversely, if you use a neutral density filter in bright environments, you can shoot with a wider aperture or longer exposure times.
By shooting with a longer exposure time, you can achieve beautiful effects.
Normally, images are overexposed if you choose a particularly long exposure time.
With a neutral density filter, you can prevent this and photograph with a long exposure time despite plenty of light.
This results in blurred movements and blurred lines.
This allows you to depict bodies of water, clouds, and fast-moving objects in a particularly creative way.

The K&F Concept Nano-X PRO Series ND1000 filter impresses with its outstanding quality; it comes in a stylish case with a magnetic closure and a cleaning cloth.
I took five pictures with it, which I numbered. The difference is clearly visible.
The filter is worth the money; it screws on easily, and even my lens protector still fits.
This filter makes you want more and gets full marks from me!