Corporate embeddedness and sustainable corporate behaviour are closely linked. Consequently, recent literature has introduced the term sustainability embeddedness. However, the concept is still at an early stage, and both its conceptualisation and practical implications remain incomplete. From the literature review, it can be determined that the term sustainability embeddedness can be classified as one of the so-called fuzzy concepts because its use in different literatures is associated with different meanings. The main goal of the study is to review the previous interpretations and to contribute to the literature on the concept with a specific explanation, placing it in the set of previous definitions. A further aim of the research is to identify the best sustainable practices of corporate embeddedness using the quintuple helix model. The goal is to demonstrate how sustainability practices can enhance mutually beneficial relationships between companies and other actors within the local space. The study serves as a literature basis for later research, in which, as a continuation of the collection of practices, small and medium-sized family businesses in Gyor, Hungary, will be examined. Along the theoretical model of the study, practical implications can be identified as they may serve as an incentive practice for regional small businesses, which helps to deepen their degree of embeddedness, thus exploiting additional local benefits for the local space.