Secondary customers refer to individuals or groups who indirectly benefit from a product or service, but are not the primary target audience. These customers may not directly purchase the product, but their support or influence can impact the success of the business. They can include stakeholders, partners, or even friends and family of the primary customers. Secondary customers play a crucial role in the growth and sustainability of a business, as their satisfaction and loyalty can lead to positive word-of-mouth and brand advocacy. Therefore, it is important for businesses to consider the needs and preferences of secondary customers in order to maintain a strong and loyal customer base.