On the Save step, you specify the name, the description and the target project for your new template. These will be later used in the Run wizard.
The Name is the name by which the stack will be referenced in the stacks list in Stack Builder and Run wizard catalogs. It is recommended to give a name that would be descriptive and provide maximum information on the stack purpose. The Description provides the description for your stack. The descrption will be displayed on the stack parameters specification step in the Run wizard The Project identifies the project to which the stack will be uploaded and later available.
For more details on the Run wizard usage, please, see our Web Management Console Guide