Electric current is the flow of electrons in a conducting material like a metal.
The current or electricity heats up the substance it flows in. This is used in electric heaters.
The electric current flows from a higher potential towards a lower potential. The electric current has a harmful effect on animal, human and plant bodies. It gives shocks.
Electric current can induce magnetic fields in space or in (para-magnetic or ferromagnetic) materials around the substance.
Electric current helps inducing electric current due to electromagnetic induction effect. This is used in induction cooking.
When electric charge discharges in small duration, there is a lightning or spark. A high potential difference in space across a small air gap, creates a spark . This is used in vehicles to start electronically.
Electric current allows energy to be stored in magnetic fields in an inductance or in terms of charge in capacitors. Electric current has effect of separating positive ions and negative ions in a compound, during electrolysis. Thus electric current has the effect of conversion of energy from solar energy to electric or chemical energy to electric energy.
Also electric current has the effect of converting electric energy into chemical or optical energy.