It seems to form a wormhole like pattern between the other clouds. We have to care. It plays a major role in astronomy. You can tell there's dust in space because of the so-called dark clouds Some bright nebula are not emitting emission lines but are reflecting star light. The reflections comes from dust.
Dust also causes extinction.
Before astronomers knew there was dust, extinction caused them to underestimate the size of he milky way. IR light has a wavelength that is the same size or bigger than dust grains so it can penetrate dust clouds. Grains are made of cores and mantles. The surfaces of dust grains may be ice or tarry mixes of molecules. Its on the surface of dust grains that molecules form and then get ejected.