GrafanaCONline 2021 Day 3 featured in-depth sessions on Grafana Tempo, its open-source distributed tracing tool, with significant improvements in scale and efficiency, as well as new features like autologging and upcoming capabilities such as native search and long-term storage for exemplars. Pernod Ricard showcased their use of Grafana and Loki for monitoring their global e-commerce Magento sites, detailing their AWS-based infrastructure and future growth projections. Jodie Barnsley presented her master's project using Grafana and InfluxDB to predict air quality, while lightning talks offered advanced tips for optimizing Grafana usage, including deploying with Tanka and using dynamic variables. Dapper Labs highlighted their journey of scaling their observability platform with Grafana, Cortex, Loki, and Tempo to manage 3 million metrics per minute, emphasizing the importance of a consistent monitoring stack despite significant changes in business needs. The recap also previewed upcoming sessions focused on IoT applications and environmental data visualization, offering opportunities for community engagement via Slack.