The platform offered by CastingN allows small and medium-sized businesses to connect with agencies and subcontractors for various services such as marketing, design, and recruiting. Through their registry of subcontractors, CastingN matches companies with the most suitable professionals for their specific needs. The platform also provides additional programs like job-oriented content development and offline job training to enhance the outsourcing process. Overall, CastingN is a B2B trading platform that helps companies efficiently outsource their services to specialists.