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Start before LLMs. Understand where AI, ML and neural networks fit.
Validation Set
The validation set is held-out data used during model development to tune choices and detect problems such as overfitting.
Think of it like
Think of Validation Set as one layer in a very large toolbox: you only need to understand what job that layer performs.
Real life
A phone spam filter, recommendation engine, fraud detector or voice assistant may use Validation Set somewhere inside.
SRE lens
A team can compare model variants on validation incidents before choosing one.
Remember thisThe validation set is held-out data used during model development to tune choices and detect problems such as overfitting.