Alright, enough with the dry talk—what use is that? Let's look at the dashboard screen of the Zabbix web frontend, showing only a very basic standard configuration:
The Zabbix dashboard shows you a high-level overview of the overall status of the monitored system, the status of Zabbix, some of the most recent problems, and a few more things. This particular dashboard shows a very tiny Zabbix setup. Eventually, your Zabbix installation will grow and monitor different devices, including servers of various operating systems, different services and the hardware state on those servers, network devices, UPSes, web pages, other components ...