When a startup is confronted with the prospect of hiring a head of marketing, founders heads often spin. What should be the day-to-day tasks for this person? What skill sets are important? Because of the seeming abstract nature of marketing, founders sometimes delay finding a head of marketing until they feel acute pain, at which point they can clearly identify the attributes of the right candidate. But underinvestment in marketing, like underinvestment in infrastructure or software or product, isn’t a good idea.