diff --git a/README.md b/README.md
index 3e09352af7c..4f0ad28861f 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,10 @@ Meet the Flower community on [flower.dev](https://flower.dev)!
 
 Flower's goal is to make federated learning accessible to everyone. This series of tutorials introduces the fundamentals of federated learning and how to implement them in Flower.
 
+0. **What is Federated Learning?**
+
+   [![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/adap/flower/blob/main/doc/source/tutorial/Flower-0-What-is-FL.ipynb) (or open the [Jupyter Notebook](https://github.com/adap/flower/blob/main/doc/source/tutorial/Flower-0-What-is-FL.ipynb))
+
 1. **An Introduction to Federated Learning**
 
    [![Open in Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/adap/flower/blob/main/doc/source/tutorial/Flower-1-Intro-to-FL-PyTorch.ipynb) (or open the [Jupyter Notebook](https://github.com/adap/flower/blob/main/doc/source/tutorial/Flower-1-Intro-to-FL-PyTorch.ipynb))