Tom Moors gave a presentation on monitoring an Atlassian stack at the Atlassian User Group Belgium conference. He discussed the importance of monitoring for detecting issues, reducing costs, and improving service. He covered different levels of monitoring including availability, infrastructure, processes, applications, business metrics, and logs. He provided examples of tools that can be used for each level like Icinga, StatsD, Graphite, Logstash, and Kibana. He emphasized building a complete monitoring toolchain and using dashboards for visibility.