# The “Deep” in Reinforcement Learning [[deep-rl]]

What we've talked about so far is Reinforcement Learning. But where does the "Deep" come into play?

Deep Reinforcement Learning introduces **deep neural networks to solve Reinforcement Learning problems** — hence the name “deep”.

For instance, in the next unit, we’ll learn about two value-based algorithms: Q-Learning (classic Reinforcement Learning) and then Deep Q-Learning.

You’ll see the difference is that, in the first approach, **we use a traditional algorithm** to create a Q table that helps us find what action to take for each state.

In the second approach, **we will use a Neural Network** (to approximate the Q value).

Schema inspired by the Q learning notebook by Udacity

If you are not familiar with Deep Learning you should definitely watch [the FastAI Practical Deep Learning for Coders](https://course.fast.ai) (Free).