An IP Pool is a single configuration point for the assignment of IP addresses to clients. Basically, an IP pool is a group of IP addresses for use by a specific customer. Each customer pool (or pools) must have its own set of IPv4 addresses which must not overlap with those of any other pool belonging to the same customer. You can allocate addresses from customer pools across multiple Layer 3 VPNs for a particular customer.
A definition of IP Pools terms is provided below
The unique number ID assigned to one host or interface in a network
A portion of a network that shares a particular sub net address
A 32-bit combination used to describe which portion of an address refers to the subnet and which part refers to the host
A network connection
Internet Protocol Version 4 (IPv4) is the fourth revision of the Internet Protocol and a widely used protocol in data communication over different kinds of networks