Pandora is a monitoring tool that allows users to monitor systems and applications by collecting data from software agents installed on servers. It has a distributed architecture with high availability and load balancing. Users can add agents and modules through the web console interface to monitor things like server resources, services, and network connectivity. Pandora collects data from agents and stores it in a database, and can generate alerts via email, SMS, SNMP traps or syslog if monitoring modules detect issues.