What Is Labeled Data?

Labeled data is a set of examples where each answer is already written down so the computer can learn from them.

Imagine it like this: A fruit basket where each fruit has a little tag saying "apple" or "orange." That's labeled! A basket without any tags is unlabeled — the computer would have to guess without any help.

Examples:

• A cat photo labeled "cat"
• An email marked "spam" or "not spam" by a real person
• A real estate listing with its actual sale price attached

So? Supervised learning needs labeled data — it's the "answer key" the computer studies from. No labels, no learning (at least not this way)!