Hi Binod Singh,
Kindly refer the following learning path for excel importer module configuration
The below documentation will helps you to understand each and every tab present in ExcelImportOverview configuration page.
In the excel importer, there is a possibility to import a excel file and then configure the excel import template. But thats only the configuraiton level. The entities in the modeller, you need to build by yourself and map then the fields on the configuration of the excel importer.