Memcached means “memorycached,” which simply is caching resources in the memory. These resources can be data retrieved from API calls.
As distributed Memcached, you can install Memcached on various servers to make a larger caching server. In this way, Memcached helps reduce database loads to a minimum, resulting in faster and more responsive Web applications.
Memcached::addServer — Add a memcached server to connection pool
Using this function, you can all memcached servers to a pool which will be used to serve huge caching.