Each instance consists of states. A state is a collection of data, code and applications at a given point in time. The current state is the only mutable state: it is the only state in an instance that can be modified. Working in the current state, you can upload, delete, rename, and work with files and tables, as well as create and start applications.
Other states are called snapshots. A snapshot is an immutable state. Snapshots can be created of the current state.