Once you have selected your excel sheet then click on Setting icon to configure different column name to corresponding variable.
Excel loop will iterate as per the number of data row in your excel. For each iteration value of column variable will get updated as per the value in each incremental row
Double click on the excel. You can put your business logic inside the same. Value of the column variable will be the value in the row of that specific column for that iteration count.
For ex: If i have a excel with Column (Name) and values Amit, Amol, Sunit then my excel loop will iterate 3 time. Say i have mapped Name column to nm string argument. Value of nm will be Amit in first iteration, Amol in second and Sunit in third