In a weight training program, what does high volume / low volume mean?

Volume = sets/reps: When talking about workout programs, the word "set" refers to the number of times a particular exercise is performed in a workout session; "reps" or "repetitions" refers to the number of times a lift is performed in a give "set".......For example, "2 sets of 10 reps" means that a bench press, for example, was performed two different times and each time, you bench pressed the weight for 10 reps.