HubSpot's Product Marketing Manager Jeffrey Vocell discusses the structure and launch process of product marketing at HubSpot during a 2015 Partner Day event. The process involves understanding the customer, market analysis, positioning, and creating a comprehensive launch plan, while HubSpot operates within three distinct launch seasons: inbound, tuna, and seed. Each season focuses on different aspects of product development and marketing, ensuring that the product meets market needs and is effectively communicated to customers.