I think the best step to take is conduct an external market analysis in order to assess the existing players that operate in your line in business, be it companies that are direct or indirect competitors. In addition, I would also look into their product / service offerings and try to learn more about their market positioning from a 4Ps perspective (price, product, place and promotion). In doing so, this should give you some better insights into how your business standout interns of your USP.