# Action

> Source: https://sukruyusufkaya.com/en/glossary/eylem
> Updated: 2026-05-13T20:00:42.011Z
> Type: glossary
> Category: yapay-zeka-temelleri
**TLDR:** The decision output chosen by an agent according to the current state, which produces an effect on the environment.

<p>An action is the visible output of the decision-making chain. The agent perceives the environment, evaluates the state, and finally makes a choice; that choice is the action. Recommending a product, moving a robotic arm, approving a transaction, or raising a security alert can all be examples of actions in different systems. An action should be evaluated not only as a chosen output, but also in terms of the effect it creates in the environment. That is why action design is about not only what the system thinks, but what it does.</p>