Molecular docking is a computational method used to predict how one molecule (typically a small ligand or drug candidate) fits into and binds with a target macromolecule such as a protein or nucleic acid, by exploring many possible orientations and conformations of the ligand in the target’s binding site and then evaluating each pose with scoring functions that estimate binding affinity; this allows researchers to identify the most stable, energetically favorable binding mode and is widely used in structure-based drug design, virtual screening of large compound libraries, and in studying molecular recognition and biomolecular interactions at the atomic level.