The tutorial explains how to query InfluxDB Cloud with the Apache Arrow Flight SQL interface using C++. The process involves setting up an environment, importing required classes, gathering authentication credentials and a query, defining a main class, connecting to the Arrow client, setting up the Flight SQL Client, executing a query, fetching results, and reading them into an Arrow Table. The tutorial assumes that the user already has a free InfluxDB Cloud account and Docker running on their machine. It provides a code walkthrough and references additional documentation for further learning.