This talk will serve as an introduction to the term "frailty" and how the assessment of frailty is an underutilized and important part of acute care medicine. The increased adverse outcomes associated with increased frailty will be discussed, and the differentiation between advanced age and frailty will be highlighted. There are many existing tools for frailty assessment, so after a brief overview of their historical roots, notable and well-studied assessment tools for the emergency department will be presented. The lecture concludes with implementation ideas and initial steps for investing in frailty-aware care.