Building an analytics dashboard is crucial for organizations to make informed decisions. Open source charting libraries like Chart.js, Recharts, and Apache ECharts can help simplify big-data analytics. This tutorial will guide you through building an e-commerce analytics dashboard using React, Apache ECharts, and Cube. You'll learn how to integrate Cube with ECharts, which offers robust visualizations for data returned by Cube's API. By setting up a sample project, you'll create four charts displaying revenue growth, orders over time, orders by status, and orders by product category name. The tutorial also covers generating a data schema with Cube, combining measures and dimensions to ask questions about the data, and integrating ECharts with React. With this knowledge, you can build an analytics dashboard from scratch and add analytic elements to your existing applications using Cube's headless API layer.