Generally, in a marketing plan the following points are considered _ Market Analysis: First analysis your broader market, where are the opportunities that you can look for? What are the scopes in the current market? After analyzing the broader scope of the market; target on the niche values.
Imagine if you can do all these and manage all these in a marketing plan? Systematic, organized, well thought, innovative and captured all your pertinent business information, don't you find having a marketing plan is useful for your business?