This document discusses personas and how to create them. It explains that a persona is a fictional but realistic portrait of a customer that merges characteristics of similar people. Good personas have common characteristics that define an archetype as well as personal details that bring the persona to life. The document provides questions to consider for different types of business customers like B2B, B2C, and multi-sided markets. It recommends giving the persona a face using free avatar images and provides tips for creating a persona board to develop the persona's profile. The overall goal is to help define target customers through fictional representative personas.