Before you can create Pentaho reports and analysis, the Pentaho Server needs to know where to find your data and how to connect to it, what data you want to use, how the data is structured, and what the data is like. The Data Source Wizard helps you define a data source that contains this information and guides you through the creation of your first relational or multidimensional data models for use in creating reports and analysis.
After you define a data source, you can make it available to people who create reports and analysis so they can simply pick the data source they want to use from a list and begin creating their reports or analysis. One data source can be used by any number of reports or analysis.