An idea or event offered for sale is a "Product".
In business, a product is a tangible or intangible offering that is created or designed to satisfy a customer's need or want. It can be a physical object, a service, or an idea or event that is offered for sale to customers.
In the case of an idea or event, it could be a product such as a webinar, seminar, conference, or a consulting service that offers expertise or advice. These products are designed to meet the customer's need for knowledge, skills, or entertainment and are marketed and sold in the same way as any other tangible product.