A farm is a group of Windows Remote Desktop Services (RDS) hosts. You can create published desktops associated with a farm. You can also deliver a published application to many users by creating application pools. The published applications in application pools run on a farm of RDS hosts.
Farms simplify the task of managing RDS hosts, published desktops, and applications in an enterprise. You can create manual or automated farms to serve groups of users that vary in size or have different desktop or application requirements.