If you've been following the Air Canada strike throughout its twists and turns, you've likely heard the term "ground pay," or noticed flight attendants holding signs decrying unpaid labour. But what is that unpaid work?

The union representing Air Canada’s 10,000 flight attendants says its members will return to work after reaching a tentative agreement with the airline, effectively ending a disruptive strike that grounded thousands of flights and stranded passengers across the country.