But What Is a Neural Network?
3Blue1Brown's classic visual introduction to neural networks — the best starting point for anyone new to deep learning.
About this Video
This is the first video in 3Blue1Brown's Deep Learning series. It builds an intuitive understanding of how neural networks learn without assuming any prior ML knowledge.
What You'll Learn
- What neurons and layers are
- How a network transforms input data through layers
- The idea of learning as adjusting weights and biases
- Why depth (multiple layers) matters
Notes
Watch this before touching any ML framework. The visual intuition from this video makes gradient descent, backpropagation, and loss functions much easier to understand later.
Next: Watch the follow-up on gradient descent.