Publisher Summary This chapter discusses the persona adulthood. Adulthood is the phase of the persona lifecycle when one put their personas to use. To ensure that one's personas are used, one must provide their teammates with persona-related procedures, instructions, guidelines, templates, and tools they can easily weave in with their other tasks. Adulthood is one of the most exciting aspects of the persona lifecycle model. Until now, there have been very few documented methods for using personas beyond suggestions to include the personas in design discussions. Identifying and providing specific uses for one's personas go a long way toward making that happen. Hundreds of decisions are being made every day by your product team as they plan, build, and promote their product. One can make those decisions with their target customers in mind or without them. Much of the time, such decisions are made via implicit assumptions, known only to the single decision maker. Personas can help their product team be user centered. They can take part in those decisions to make the implicit become explicit. They can help move an entire team in a user-focused direction.