A collection of examples used to train, validate, or test a machine learning model.
Friendly Description: A dataset is a collection of examples that an AI studies to learn how to do its job. Think of it as a giant flashcard deck. The more good flashcards the AI sees, the better it gets. Datasets can contain pictures, sentences, sounds, numbers, or just about anything else, depending on what the AI is being trained to do.
Example: If you wanted to teach an AI to recognize different types of birds, your dataset might be 100,000 photos of birds, each one labeled with the species. After studying the dataset, the AI could look at a brand-new bird photo and make a confident guess at what kind it is.