You can create as many databases as you like. Each database is a set of related data. You as a database owner or a person that has administrative rights can customize structural information on how the data is organized and adjust the ways of working on that data for database users.
To organize working with database handier you can:
Slice large collection of tabs into workspaces
Create the online repository available to database users only, or to any Web user
Add new variables to use them later in the system
Use the error log to analyze, identify and fix problems users encounter