This document discusses defining the end user profile for a new product. It provides an example of creating an end user profile for a smartwatch designed for visually impaired individuals. The profile defines the target users as males aged 20-35 who are or became visually impaired, live in cities on the east coast, are students or young professionals, and care about fashion. The document emphasizes narrowing in on a specific user profile and obtaining an in-depth understanding of users' characteristics, motivations, and needs in order to design an effective product.