The provided information does not directly detail what Petson does, its services, or target audience. However, based on the URL and LinkedIn URL, it appears to be related to a company named "Petson Group." Without specific details from the URLs, it's challenging to determine their unique selling proposition (USP). Typically, a company's USP is a unique benefit or feature that sets it apart from competitors. For more precise information, visiting the company's website or LinkedIn page would be necessary. The search results also mention unrelated companies with similar names, such as Petson Corporation and Petson Building Supply, Inc.