what is the purpose of a flying buttress?

what is the purpose of a flying buttress?
Answer
Brief Explanations:
A flying buttress is a key architectural element in Gothic architecture. Its main purpose is to transfer the lateral forces (thrust) from the walls and vaults of a building to an external pier or buttress. This helps to support the weight of the building and allows for the creation of large - scale, open - interior spaces with high, thin walls and large windows.
Answer:
To transfer lateral forces from walls and vaults to an external support, enabling the construction of large, open interior spaces with thin walls and large windows.