Learn how to tell the difference between a single pole switch and a three-way switch in this video. This includes ON-OFF labels, number of switches per light,
and number of terminals on the switch. I have also included circuit diagrams for a visual representation.
I am in no way responsible for anything that you attempt!
See also:
How to Change a Single Pole Switch in Under 3 Minutes
https://youtu.be/9a1deHdZtUk
How to Change a 3-Way Switch in Under 3 Minutes
https://youtu.be/U6DO7KQDMTI