Why Airlines Overbook Flights
The gist
Airlines overbook flights to compensate for passengers who cancel or don't show up, ensuring planes fly as full as possible.
Explain like I'm 5
It's like when you invite more friends than seats at your table because some might not come, so you still have a full table.
Big picture
Overbooking helps airlines maximize revenue and keep ticket prices lower, but it can sometimes lead to passengers being bumped from flights.