As designers, we try to be cognizant of what makes a good design. Clients, good or bad, have their own ideas as to what they want to see, and in some cases good collaboration makes for good design. On the other hand, if most clients were good designers to begin with, they probably wouldn’t need a design firm to do their work for them, now would they? This infographic from BuySellAds, gives a good primmer for what makes not only a good banner ad, but good advertising design in general.