In our day to day life, many Terabytes of data are generated by various organizations around the world, as data has been increasing each day in Tremendous amount there is a need for some tools and techniques which may be used and hence help humans to analyze large data repositories and gain some useful information. This need which keeps on increasing on daily basis gives rise to an area known as Data Mining or Knowledge Discovery of Databases. The main aim of Data Mining is to extract some useful unknown patterns or knowledge or information from the vast amount of data repositories. In this automated world, many organization uses Data Mining as it enhances various fields of human life including education, agriculture, business, etc. using Artificial Intelligence, Machine Learning, Pattern Recognition, and various data visualization techniques. This paper discusses and describes Data Mining and how data mining is performed for Retail Industries, the paper also describes how data mining can be used for Fraud Detection.