Aggregation Kinetics is a theoretical framework within colloid science that quantifies the rate and mechanisms by which dispersed colloidal particles undergo irreversible association or clustering due to competing interparticle forces, such as van der Waals attraction, electrostatic repulsion, depletion interactions, and hydrodynamic effects, thereby distinguishing it from equilibrium self-assembly processes by its focus on time-dependent, non-reversible aggregate formation in metastable dispersions.