What is CRM? How can it affect on e-business?

The market had changed very dramatically during these past decades and we are now reaching to the consumer power era. Couple decades ago, customers will not mind to purchase any car as long as it had four wheels and could operate well. In this era, however, customers have hundreds to thousands choices of vehicles available in market varying in models, quality, color and price. Customers therefore possess the more powerful position in the market today.