This tutorial helps you to understand the basic concepts of Salesforce.com (SFDC). Currently, Salesforce.com is the number one on-demand CRM application on the market. SFDC runs on the Force.com platform, reduces development cost, and with it you can develop and deploy custom applications in very short time.
Salesforce is a cloud computing technology. It is available on the cloud, There is no need to install any software and practically no hardware is required (outside of a computer with web browser).
In salesforce.com you can either develop our own applications or if you need any application on-demand, you can buy it from the App Exchange – a market place where SFDC users buy and sell custom applications.