AI is the branch of computer science that is designed to attempt a replication or simulation of human intelligence in machines. The term was first discovered in 1956 but its use came into existence only in recent times. It is a system able to perform tasks that ordinarily require human intelligence. The term is frequently applied to the project of developing systems endowed with the intellectual processes characteristic of humans, such as the ability to reason, discover meaning, generalize, or learn from past experience. 
The ideas related to Artificial intelligence are thinking humanly, thinking rationally, acting humanly and acting rationally and they are all concerned with processing, reasoning and behavior of the computer system. 
 It carries a great importance as it adapts through progressive learning algorithms, automates repetitive learning and discovery through data, analyzes more and deeper data to get the most out of data and with incredible accuracy.
Most AI examples that you hear about today – from chess-playing computers to self-driving cars – rely heavily on deep learning and natural language processing