The Elastic Advent Calendar 2020 offers insights into various technical topics in its third week, including preparing for Elasticsearch interviews, monitoring Tekton tasks and pipelines with Elastic Observability, Korean text analysis using the nori analyzer, and setting up searchable snapshots in Elasticsearch. The series highlights the significance of distributed tracing for cloud-native applications with OpenTelemetry and Elastic APM to enhance observability and root cause analysis. Additionally, it explores exploratory data visualization with Kibana and the integration of log correlation with Application Performance Monitoring for comprehensive ecosystem insights. This week emphasizes the utility of Elastic's tools in optimizing data analysis and monitoring workflows across different languages and platforms.