But on an almost daily basis, I encounter confusion from my clients, many of whom are hoping for marketing results from PR efforts and PR results from marketing efforts. To my mind, the business I'm in is all about taking a brand as it is and making people fall in love with it. What PR *can't* doPR is pretty cool, right? Here's what else it can't do:#1: PR can't generate sales. Whether you're looking for PR, marketing or a combination of both, there are oodles of choices for you on the marketplace.