Reinforcement learning (RL) is an area of machine learning concerned with how intelligent agents ought to take actions in an environment in order to maximize the notion of cumulative reward. Reinforcement learning is one of three basic machine learning paradigms, alongside supervised learning and unsupervised learning.

Reinforcement learning differs from supervised learning in not needing labelled input/output pairs to be presented, and in not needing sub-optimal actions to be explicitly corrected. Instead the focus is on finding a balance between exploration (of uncharted territory) and exploitation (of current knowledge).
According to the passage below, what is Reinforcement Learning?
In machine learning, reinforcement learning (RL) is a domain concerned with how intelligent agents respond to maximize their total rewards. Alongside supervised and unsupervised learning, it is one of 3 types of machine learning. Unlike supervised learning, RL does not require labeled data.