It doesn't need to be full-fledged at this point, but it should answer who you're trying to sell to and how you plan to target them.
Your marketing plan describes your strategy for connecting with your target market and generating leads. It doesn't need to be full-fledged at this point, but it should answer who you're trying to sell to and how you plan to target them. Investors also want to know how you plan on selling your brand and breaking into the market, so make sure to consider their perspective as you develop your marketing strategy.