What is Deep Learning?

There are neural networks that consist of only one or two layers. These networks are called "flat networks". If a net consists of many layers, it is called a "deep" neural net. It is also called "deep learning". Such systems are particularly well suited for highly complex problems.

Due to the immense complexity of systems and computing operations, it is almost impossible to understand how such a system achieves its results. The systems thus resemble a "black box".