It is the transfer of male gametes in the form of pollen grains from the anther to the stigma.
Types of pollination:
Self-pollination: It refers to the transfer of the pollen grains from the anther to the stigma of the same flower or the stigma of another flower of the same plant.
Cross-pollination: It refers to the transfer of the pollen from the anther of a flower to the stigma of another flower of a different plant of the same species.