I couldn't find specific information about Inter Relations & Company from the provided URLs or search results. However, based on typical companies with similar names, they might offer services related to public relations, marketing, or business consulting. Their target audience could be businesses seeking to improve their brand image or communications. The unique selling proposition might involve personalized service and strategic communication strategies tailored to each client's needs. Without more details, it's challenging to provide a precise description of their services or target audience.