The basic idea
A neural network is a pattern-learning machine. You give it examples, it makes predictions, and then it adjusts itself when the prediction is wrong.
Inputs, weights, and layers
Inputs are the information the model sees. Weights control how strongly each input influences the output. Layers combine simple signals into more useful representations.
- Early layers can detect simple patterns.
- Later layers combine those patterns into higher-level meaning.
- Training updates the weights so the model improves.
Why this matters
Understanding neural networks makes the rest of AI easier to learn. Deep learning, transformers, computer vision, and language models all build on this pattern: learn useful representations from data.