What is one purpose of writing a business plan before entering the market?

One of the reasons to write out a business plan regardless of any financing option concerns is that it can help you stay organized and remain on track. Businesses without a plan can easily get off-target, and revenues will suffer as a result. Creating a plan with expense projections, revenue forecasts, and more can help a small business remain committed to its long-term goals.  You can look online for more purposes :))