Update Deep Learning README.md

I have updated the Deep Learning readme in order to help understanding the topic before digging into it .

Author: WiemBorchani

9_Deep_Learning/README.md

@@ -1,6 +1,19 @@
 ## Deep Learning
+<br>
+Deep learning is a machine learning technique that teaches computers to do what comes naturally to humans.It's a key technology behind driverless cars, enabling them to recognize a stop sign, or to distinguish a pedestrian from a lamppost. 
+<br> 
+1. Deep learning requires large amounts of labeled data.
+<br>
+2.Deep learning requires substantial computing power.
+<br> <br> 
+
+### What's the difference between deep learning and Machine Learning?
+<br> 
+Machine learning and deep learning are both types of AI. In short, machine learning is AI that can automatically adapt with minimal human interference. Deep learning is a subset of machine learning that uses artificial neural networks to mimic the learning process of the human brain.
+<br> <br>
+
+### Here we have two types  of neural network:
 
 [1. Artificial Neural Networks (ANN)](Artificial_Neural_Networks)
 
 [2. Convolutional Neural Networks (CNN)](Convolutional_Neural_Networks)
-