The document discusses various options for enabling offline functionality when using Salesforce on mobile devices. It describes the Salesforce Mobile SDK, which allows creating native iOS and Android apps that can work offline through features like the SmartStore encrypted database and SmartSync for data synchronization. HTML5 apps and hybrid apps are also covered as alternatives, though they require additional frameworks and configuration to support offline scenarios. Several use cases are provided as examples that could leverage different solutions like Salesforce1, native apps, or hybrid apps to enable offline mobile access to Salesforce data.