While business development, sales, and marketing are separate domains today, there’s still an inevitable overlap in their functions. The critical difference is that marketing pertains to product and service design, price, distribution, and the associated promotional activities for a particular product, service, and business. These efforts bring in leads and opportunities to expand your markets. Since business development has been part of marketing historically, it is often hard to look at the two in isolation. Unfortunately, many businesses still consider the same role for marketing and sales as business development. However, all these functions should ideally work separately but in line with each.