Targeting minions is specifying which minions should run a command or execute a state by matching against hostnames, or system information, or defined groups, or even combinations thereof.
For example the command
salt web1 apache.signal restart to restart the
Apache httpd server specifies the machine
web1 as the target and the
command will only be run on that one minion.
Similarly when using States, the following top file specifies that only
web1 minion should execute the contents of
base: 'web1': - webserver
There are many ways to target individual minions or groups of minions in Salt: