Salesforce applications are hosted on the Salesforce cloud, which is a cloud computing platform provided by Salesforce. The Salesforce cloud is a multi-tenant platform, which means that multiple customers share the same infrastructure and resources. This allows Salesforce to provide its customers with a highly scalable and reliable platform for running their business applications.
The Salesforce cloud is made up of a number of different components, including the Salesforce CRM (customer relationship management) platform, the Force.com platform, and various other applications and services. Customers can access the Salesforce cloud through a web browser or via APIs (application programming interfaces), and they can use the platform to build and deploy a wide variety of business applications, including customer relationship management, e-commerce, and financial management applications.