verifying the data
This step shows a list of the loaded records that will be linked to the selected set (up to this step no data has yet been linked).
Scroll the list to ensure that the list fits your needs.
At this point by clicking the Next button, the data will be actually loaded and associated with the selected label set.
The Remove existing elements from the labels check box enables you to clean (remove) all elements present on the label, so that once the data is actually connected, you will start over from an empty label, ready to add your new data.