This section explains what the specifications above mean, and some other things you'll need to know. First, some definitions. Mainly important as the upper limit on your refresh rate. The highest frequency you can feed into your monitor's video input and still expect to see anything discernible. For tolerably crisp display of fine details in the video image, however, you don't want it much below your highest DCF, and preferably higher.
Higher frequencies are better, as they reduce flicker.
60Hz is good, VESA-standard 72Hz is better. We'll get to the details of this below. A high bandwidth means smaller visible details. Your monitor uses electronic signals to present an image to your eyes. Such signals always come in in wave form once they are converted into analog form from digitized form.