In the digital world everything is developing faster and powerfully. New technologies will be introducing by the IT expects to make the devices more user friendly and more intelligent by modifying the functionality in such manner, that the work of individuals will become cost effective and efficient. More complex problem can be easily tackled and solved. The algorithm which helps to developed intelligent devices that can handled the complex and unsolvable problem is known as machine learning algorithm. In this paper, we will discuss the issues and challenges that can be occur to developed smart devices and also we will study the different algorithms provided by machine learning.