Now electroplating is the use of electrical current to coat metal cations onto a metal electrode. Now here when we say electrical current, this is the rate at which electrons move from electrode to electrode in a closed complete circuit. So we're talking about electrons traveling from the anode to the cathode.
Now here remember when we say rate, rate is just amount of something over changing time. Now here the SI unit for electrical current is amperes or amps, which uses capital A. And what's important here is that one ampere is equal to 1 C/s. So this is going to be an important conversion factor when we're talking about the calculations involved with typical electroplating questions.