What is machine learning?

Generally, when we talk about machine learning, we get into the idea of us fighting wars with intelligent machines that we created but went out of control. These machines are able to outsmart the human race and become a threat to human existence. These theories are just created for our entertainment. We are still very far away from such machines.

So, the question is: what is machine learning? Tom M. Mitchell gave a formal definition:

"A computer program is said to learn from experience E with respect to some class of tasks T and performance measure P if its performance at tasks in T, as measured by P, improves with experience E."

This implies that machine learning is teaching computers to generate algorithms using data without programming them explicitly. It transforms data into actionable knowledge. Machine learning has close association with statistics, probability, and mathematical optimization.

As technology grows, there is one thing that grows with it exponentially...