Poles, meaning when referring to pins on a switch?
On a switch or relay, a pole is one switching circuit, consisting of the Common (moving contact) NC (normally closed) and NO (normally open) terminals.

On a toggle switch, the rows of terminals for a pole are in the same direction as the lever movement, with Common in the center.  The closed contact will usually be on the side opposite the lever (lever up, contact is made between center and bottom contacts.)

With a pushbutton, you will have to use an ohmmeter to determine the terminal arrangement.