Also known as a sole trader, proprietorship, or individual entrepreneurship, the sole proprietorship is the most common and simplest business structure. If you’re wondering what is a sole proprietorship, and what sole proprietorship means, the truth is you might be running one without even knowing it. We’ve provided you with all the answers to help you find out all the pros and cons of this kind of enterprise, what to do if your venture starts growing and how to avoid the most common mistakes business owners make.