Every business needs to add value in the chain between the producer and the consumer. If you are not the producer than you should be very clear what value you are creating sitting in the chain. Many new businesses today aren't really clear on what value they are adding which leads to still-born ideas and stalled enterprises.
Founders spend hours talking about the the market opportunity, features of their product etc but if they only spoke for 10 minutes about the value they are adding, they would have me convinced. It's not complicated.
Ron