A basic grasp of design principles is useful for any marketer — maybe you’re part of a scrappy DIY team and need to do your own design, or maybe you just want a better understanding of what your in-house design team is up to.
I’ve worked with many graphic design teams over the years, and in my experience, understanding some of these predefined tenets of design can improve cross-team communication, because you’ll have a better vocabulary to describe the problem(s) that need to be solved.