Apache Superset is an open-source data exploration and visualization platform that enables users to build dashboards with charts for internal users. It has connectors for numerous databases, a web-based SQL IDE, and no-code tools for building charts and dashboards. Cube is an open-source metrics store that serves as a single source of truth for all metrics and provides APIs for powering BI tools and building data apps. By connecting Superset to Cube, users can build a metrics store that loads in under a second. The tutorial covers the process of setting up Superset and Cube, defining metrics, creating charts and dashboards, and fine-tuning the caching behavior to achieve fast loading times.