A current of 1 Amp in a circuit with a resistance of 1 Ohm delivers a power of 1 Watt. A shock requires a difference in electric potential between one part of your body and another. Suppose you received an electric shock by touching a wire with a wet hand while standing in a mud puddle. Power x time. Power companies sell us Electric Energy usually meas in kiloWatt-hours.
Electric current is the rate that charge flows in a circuit.