The shared responsibility model describes the distribution of security responsibilities between the platform provider—in this case, Salesforce—and its customers. Salesforce is responsible for the security of the platform itself, including its physical infrastructure, network security, and application-level security controls. Customers, on the other hand, are responsible for things like configuring access controls, setting user permissions, applying data security settings, as well as monitoring and managing their data and application configurations. This model emphasizes that, while Salesforce maintains a robust and secure platform, customers must actively engage in configuring and managing their Salesforce instance to ensure the security of their specific data and applications.