Customer Segments are the groups of people or organizations a company aims to reach or serve with its products and services. These are fundamental since every business needs profitable customers to survive.

A good way to represent a company’s customer segments is through buyer personas.

Buyer Personas are avatars of a segment, and they transform the hard facts about your target audience into ‘living’ people.

Buyer Personas Model is powerful for marketing, advertising, content creation, product or service development, target support, public relations, pricing, and sales since it puts the focus on the relationship that can be created between the company and the target.

Another resource to learn about this is: https://www.bizshakalaka.com/home/business-model-canvas/bmc-01-framework-2/use-cases-of-business-model-canvas/bmc-02-0-canvas-alternative-applications/bmc-02-1-buyer-personas-canvas/