Here, you can select objects that will be imported by checking the Import checkbox next to the given object.
|•||All - all the objects in the list will be imported|
|•||None- none of the objects in the list will be imported|
|•||Default - the objects preselected in Step 1 will be imported|
For more information on the export/import functionality in Kentico CMS, please see Developer's Guide -> Managing sites -> Export and import.