The BizTalk Host object represents a logical set of zero or more runtime processes in which you can deploy services, pipelines, and other artifacts. The Host object is a part of BizTalk Application View model and it represents a collection of runtime instances (zero or more) where the deployed items physically run. A BizTalk host can be either an in-process host, which means it is owned and managed by BizTalk Server, or an isolated host, which means that the BizTalk Server code is running in a process that is not controlled by BizTalk Server.