What is the role of 'reward' in reinforcement learning?

What is the role of 'reward' in reinforcement learning?

Step 1: Understand that reinforcement learning involves an agent that makes decisions.
Step 2: Know that the agent takes actions in an environment.
Step 3: Realize that after each action, the agent receives a reward.
Step 4: Understand that the reward is a signal that tells the agent how good or bad its action was.
Step 5: Learn that the agent uses this feedback to improve its future actions.
Step 6: Recognize that the goal of the agent is to maximize the total reward over time.

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