I love this question because, working in the Silicon Valley, I see WAY too many companies hire their VP Sales and introduce their product with no marketing work done in advance. Marketing should help you to understand the market for your product, the customers' thought process and your own unique value, as well as the competitors you'll face so that you can properly position the product to win against the competitors in the market. Understand your unique selling proposition in advance, and make sure that it means something valuable to your prospects. Think of marketing as reconnaissance work: gather the needed intel and make a plan to win before diving in!
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