Secondary seeding involves unseeded clouds absorbing ice particles from previously seeded clouds, leading to enhanced precipitation development. This process helps propagate seeding effects in both space and time by jumpstarting precipitation formation in the receptor cloud. The absorbed ice particles grow in the donor cloud and then trigger precipitation in the receptor cloud, giving it a boost in precipitation development. This effect is most significant in continental clouds with slow natural precipitation processes. Overall, secondary seeding can accelerate precipitation formation and enhance cloud seeding outcomes.