1.3.2. Unsupervised Learning: Finding Hidden Patterns

Unsupervised learning is like being handed a pile of photos with no labels and being asked to organize them into groups. You find natural clusters based on similarities you discover yourself.

Unsupervised learning includes:

• Clustering: Groups similar items together without pre-defined categories

⚠️ Critical Exam Trap: Clustering has NO labels. If a question mentions "grouping customers by similar attributes" without predefined categories, the answer is clustering—an unsupervised technique.