Neural Networks Demystified
Build real intuition for how deep learning actually works
4.9 18,420 students 3h 0m
Beginner
Free course
3BVisit channel
Taught by 3Blue1Brown
Lessons play via the official YouTube embed. All views credit the creator.
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But what is a neural network?
Video by 3Blue1Brown · Watch on YouTube
AI lesson summary
A visual introduction to what a neural network is: layers of neurons, weights, biases and how a network turns pixels into a digit prediction.
Key takeaways
- A neuron is a number between 0 and 1
- Weights and biases are the learnable parameters
- Layers build progressively abstract features
Practical exercise
Sketch the 784-16-16-10 architecture and label where the weights live.
About this course
Start from zero and develop a visual, intuitive understanding of neural networks, gradient descent and backpropagation before touching a single line of framework code.
deep learning
math
fundamentals
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