  Today web is the best medium of communication in modern business. Many
companies are redefining their business strategies to improve the business
output. Business over internet provides the opportunity to customers and
partners where their products and specific business can be found. Nowadays
online business breaks the barrier of time and space as compared to the
physical office. Big companies around the world are realizing that e-commerce
is not just buying and selling over Internet, rather it improves the efficiency
to compete with other giants in the market. For this purpose data mining
sometimes called as knowledge discovery is used. Web mining is data mining
technique that is applied to the WWW. There are vast quantities of information
available over the Internet.
