What is a ancestral function of wings of an ostrich?

The ancestral function of wings in ostriches, like in other Flightless Birds, is believed to be related to their evolution from flying ancestors. Initially, wings would have been used for flight, aiding in mobility and escape from predators. Over time, as ostriches adapted to a terrestrial lifestyle, their wings became less functional for flying and evolved for other purposes, such as balance, courtship displays, and thermoregulation.