The provided information does not directly relate to a company named "NERO Chain" with the URL http://www.nerochain.io and LinkedIn URL http://www.linkedin.com/company/nerochain. However, based on the context, it seems there might be confusion with "The Nero Group," which operates coffee chains like Caffe Nero. If "NERO Chain" is a different entity, its specific services and target audience are unclear from the given data. Typically, a company's unique selling proposition (USP) would be identified through its unique offerings or competitive advantages, which are not detailed here. Further research is needed for accurate information.