Zoho Creator Sandbox creates a temporary replica of an application and keeps it isolated from the actual application and its users. You can make changes in the application, review them, and choose which changes to publish. Published changes will be reflected in the actual application.
Sandbox serves as a platform for preliminary testing in a restricted environment and publishing changes at once instead of performing gradual changes in the application.
Sandbox is extremely useful when changes are required in a complex application and you don't want users to access the updated application until you are finished. Without Sandbox mode, users would be accessing unfinished application changes. Reverting application changes can be a tedious task. Use Sandbox to test and finalize changes and avoid last minute reverts.