What Makes Slots Work?

Slots are the most popular form of casino game worldwide. With bright video screens and flashy bonuses, they offer much more than a simple “line ’em up” to win. But beneath all the razzmatazz, what makes them work? And do they really pay out more than they take in?

The slot definition:

A narrow opening or groove, especially one that allows something to pass through or around it. He dropped a coin in the slot and dialled.
A position or time in which an activity can occur, as determined by a schedule or program. Visitors can book a time slot a week or more in advance.