Vulnerability as one of the features of victimisation (Sparks, 1981) is a variable, sometimes subjective, and complex concept. How vulnerability is defined and recognised can be dependent upon the situation, audience, and victim circumstances. While Christie’s (1986) initial concept of the “ideal victim” indicates vulnerability as a key facet of victimisation, it has changed in more recent times with recognition of the numerous ways that vulnerability can exist and manifest. Thus, this book has offered a view of vulnerability from both practitioner and academic perspectives, giving a voice to different conceptualisations of this concept and its position within policy, practice, and research. This chapter summarises these points.