Bandwidth pooling is a process that allows sharing of unused bandwidth between your servers. Pooling makes it possible to exchange bandwidth between all the servers that are running. Generally, server hosting companies require users to pay more for usage of bandwidth which may not be even fully utilized.
With bandwidth pooling, you can share bandwidth with all your servers and that too for free.
There are many advantages of using Bandwidth Pooling. It gives you better bandwidth control, IP address portability, virtual machine portability and enhanced bandwidth which can improve your hosting experience and give you better control over server operations.