Tertiary customers refer to the individuals or organizations that indirectly benefit from a product or service, typically through the use or recommendation of secondary customers. These customers may not have a direct relationship with the company, but their satisfaction and loyalty can have a significant impact on the success of the business. Tertiary customers can include friends, family, colleagues, or even strangers who are influenced by the experiences of primary and secondary customers. Building strong relationships with tertiary customers is crucial for long-term success and growth in any industry.