Beginner · Data

Label

Visual diagram · (in preparation) · Math · (in preparation) · Worked example · 3 difficulty levels.

TL;DR. The correct answer attached to a training example in supervised learning.

Technical Definition

The correct answer attached to a training example in supervised learning.

How it works

Labels can be a class ('cat'), a number (house price), a bounding box, or a long-form answer. Quality and consistency of labels often matter more than quantity. Labeling at scale spawned an industry — Scale AI, Surge, Labelbox — and is increasingly automated with model-assisted annotation.

Related Concepts

• Supervised Learning — Learning from input–output pairs where each training example carries a correct label.
• Training Data — The portion of a dataset used to fit a model's parameters.
• Annotation — The act of attaching labels, tags, or structured information to raw data.