Shared resources (also known as resource pooling) is a characteristic of cloud services where the same pool of resources are shared among various clients of a cloud service provider based on client demand. This can be a security concern to the possibility of unauthorized data access.
Wikipedia
In resource management, pooling is the grouping together of resources (assets, equipment, personnel, effort, etc.) for the purposes of maximizing advantage or minimizing risk to the users. The term is used in finance, computing and equipment management.