A trace, sometimes referred to as a track, is a strip of copper that runs from one connection on the PCB to another connection. The trace is used to carry the voltage/current from one area of the PCB to another.
Below are two photos showing a trace.
Many PCB’s have more then one layer. This is referred to as a multilayer board. If the PCB has more then two layers, some of these layers will be placed between the top and bottom layer. Making it difficult or impossible to see the trace.
Note, cutting a trace is equivalent to cutting a wire. This will disrupt the flow of voltage/current from one area of the PCB to another.
