Daniel Lee's talk at the Swetugg 2018 conference in Stockholm focused on the principles of whitebox monitoring and the practical use of tools to monitor systems, particularly through the Azure Monitor plugin for Grafana. The presentation highlighted how the plugin integrates Azure resource metrics and live application data from Application Insights into a single graph, offering a comprehensive view of system performance. The session included a live demonstration of the plugin, exploration of the query builder for creating custom metric views, and an introduction to template variables to streamline data exploration. Additionally, Lee delved into the technical aspects of developing custom integrations with Grafana, using the Simple JSON Data Source plugin and ASP.NET Core MVC to build a basic backend integration, inviting attendees to engage with further questions and discussions on the Grafana community site.