Import & Export in SharePoint 2013

Suppose you want to migrate a list from one site collection to another site collection, Export & Import  Power Shell
commands can be used.
 
 Do the export of SharePoint list from source site collection"mysite"
 
Export-SPWeb http://localhost/mysite/ -path ”D:\backup\CustomList.cmp” -ItemUrl /CustomList-IncludeVersions All-IncludeUserSecurity

Do the import of SharePoint list from network location.
 
Import-SPWeb http://localhost/targetsite/ -path D:\backup\CustomList.cmp -updateversions overwrite