Cell potential, also known as electromotive force (EMF), is the measure of the potential energy per unit charge available from the oxidation/reduction reactions to drive the reaction. It's measured in volts (V).
Think of cell potential like a water slide at an amusement park. The height of the slide represents the cell potential - higher slides have more potential for fun, just like cells with higher potentials have more capacity to do work.
Redox Reaction: A type of chemical reaction that involves a transfer of electrons between two species. An oxidation-reduction (redox) reaction is made up of two half reactions - one oxidative and one reductive.
Electrolytic Cell: A type of electrochemical cell where electrical energy drives a non-spontaneous redox reaction. This is akin to using a pump to push water up a slide against gravity.
Galvanic/Voltaic Cell: A type of electrochemical cell where a spontaneous redox reaction produces electrical energy. This is like letting gravity pull you down the waterslide.
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