When you connect to a data source you are given the option to give it a name for use in Tableau. You can change the name you specified by selecting a data source on the Data menu and then selecting Rename. Naming a connection is useful when you have a single workbook connected to many data sources. The name you assign can help you keep track of the specifics of the connection. You can also review the connection properties by selecting a data source on the Data menu and then selecting Properties.