Deep learning is a subset of machine learning in artificial intelligence (AI) that has networks capable of learning unsupervised from data that is unstructured or unlabeled. Also known as deep neural learning or deep neural network.
How it useful:
Deep learning networks can be successfully applied to big data for knowledge discovery, knowledge application, and knowledge-based prediction. In other words, deep learning can be a powerful engine for producing actionable results.
Is deep learning important?
A single layer can compute a very complex function but to extract complex features we need Deep Learning Methods. So, Yes We DEEP LEARNING IS IMPORTANT. The reason, of course, is the ability of deep nets to build up a complex hierarchy of concepts.