Linked from
The 9 pages that link to Dust coagulation, each with the reason it gives.
Protoplanetary diskRelated: Collisions can turn microscopic disk grains into larger aggregates.
PlanetesimalBroader topic: It describes the earliest proposed steps toward planetesimal formation.
Planet formationBroader topic: It starts the conversion of disk dust into larger solid bodies.
Pebble accretionRelated: Coagulation produces the larger solids that can behave as pebbles.
Core accretionRelated: It begins the chain of solid growth that core accretion requires.