What does Quadruple mean in betting?

A Quadruple in betting is a combined bet with 4 selections. For the slip to win, all four parts have to win.

How does it work?

The player links four events or markets into one bet with combined odds. That makes the possible return higher than on a single, a double, or a treble. The condition is stricter, though: if even one selection loses, the whole quadruple loses as well.