Typical Áú»¢¶Ä²© hosts are the devices you wish to monitor (servers, workstations, switches, etc).
Creating hosts is one of the first monitoring tasks in Áú»¢¶Ä²©. For example, if you want to monitor some parameters on a server "x", you must first create a host called, say, "Server X" and then you can look to add monitoring items to it.
Hosts are organized into host groups.
Proceed to creating and configuring a host.