When unwanted electrical currents are detected, circuit breakers trip. If your outlet has been short-circuited or overloaded, your circuit breaker may have turned it off. Examine other adjacent outlets to determine whether they are operational. If they are likewise dead, go to your circuit breaker.
Before resetting the circuit breaker, disconnect and remove any appliances that are attached to the dead outlets. Too many plugged-in items might have tripped the circuit breaker. Furthermore, faulty appliances might easily short out, triggering your circuit breaker.