A quill is a writing instrument made from a feather, typically that of a goose or a swan, which was commonly used in the past for writing before the invention of modern pens. The hollow shaft of the feather served as a reservoir for ink, allowing writers to create script by dipping the quill into ink and then using the pointed end to apply it onto parchment or paper. Quills played a crucial role in the development of writing systems and were pivotal in recording history, literature, and important documents.