Zabbix is an open-source monitoring tool designed for the comprehensive monitoring of servers, networks, IT components, cloud services, and virtual machines. It serves the purpose of collecting monitoring metrics and tracking various aspects of a network, including network utilization, disk space usage, and CPU load. Zabbix is versatile and compatible with multiple operating systems, such as Mac OS, Solaris, Linux, and others. The tool utilizes various databases to store data and monitor applications effectively.