# Similarity

> Source: https://sukruyusufkaya.com/en/glossary/benzerlik
> Updated: 2026-05-13T20:59:22.684Z
> Type: glossary
> Category: yapay-zeka-temelleri
**TLDR:** A core concept used to measure how close, related, or semantically similar two examples are.

<p>The concept of similarity plays a much more central role in modern AI systems than many people initially realize. Search engines, recommendation systems, document matching, semantic retrieval, and clustering all rely on the question: “which example is closest to which?” Similarity is not limited to surface-level matching; semantic, structural, and functional closeness can also matter. In embedding-based systems especially, high-quality similarity measurement directly affects product success. In short, similarity is not just a mathematical metric, but an invisible foundation of many AI experiences.</p>