The blog discusses the basics of infrastructure monitoring using Telegraf, InfluxDB, and Grafana. It explains the difference between monitoring and observability, highlighting that they are complementary approaches to system health and performance. The authors categorize these concepts into several distinct fields, including network monitoring, server monitoring, application performance monitoring (APM), and cloud infrastructure monitoring. They present a problem to solve, where they aim to create a solution for each of these fields using the TIG stack. Telegraf is used for data collection, while InfluxDB 3.0 provides a purpose-built time series database for handling metrics, traces, and logs at scale. Grafana is used for data visualization and tracking of metrics across various data sources. The authors also touch on OpenTelemetry, which aims to provide the ability to visualize and inspect traces alongside metrics using a single pane of glass through Grafana.