No matter how great your idea is, most people expect that you have it written down. When I was new to inventing, I had no idea what that meant. I searched around but didn't find any universal format for documenting my ideas.
So, although a detailed business plan may not be required for an online business, I am going to include it here so you can at least look at and consider each section and determine yourself if it applies to your business.
A business plan is a formal statement of business goals, reasons they are attainable, and plans for reaching them. It may also contain background information about the organization or team attempting to reach those goals.
The invention process involves disclosing your invention to a wide variety of readers. As mentioned, such document is a starting point or template for providing future material with respect to the many different readers and audience for which you will need to communicate your invention.
business plan format
business plan outline