The phrase "hub of one's community" refers to a person or place that is central and vital to the activities, interactions or well-being of a particular community. It could be someone who is highly involved in community events, organizations or initiatives and brings people together. Alternatively, it could refer to a location or facility that serves as the focal point for community activities, such as a town square or community center. In either case, the phrase suggests that this person or place is essential to the functioning and cohesion of their community.