What is Machine learning?

1. Machine learning is an application of Artificial intelligence that give computers the ability to learn without being explicitly programmed.

2. With machine learning we can write a program that will learn things on its own, so with one program for example it can learn to detect if a there is a cat in the picture. Now we don't have to tell the program if each picture has a cat in it or not, the program will learn that itself using machine learning (no explicit programming required).

3. Machine Learning algorithms can be generalized ie., one machine learning program may serve for many domains.
Eg: Object recognition - If we write a machine learning program to detect a cat in a picture, the same program may be used to detect other objects also(no explicit programming).