Marketing is the soul of your business, it means anything you do for the promotion of your business comes under marketing. However, without a plan or strategy your marketing campaign will not deliver the desired results. Therefore, creating marketing plan for any business is vital.
What was the outcome? As much as 90% businesses started by entrepreneurs and small business went busted or failed within a year. I experienced one of the many busts few years ago (with my cafe business) because i don't really have a proper and "the few solid sheets" called a marketing plan.