Problem: 

I had all the necessary fields in my Magento product upload file, and the import would show no problems with the data check test. When I reviewed the import history page it said my import had 0 created, 0 updated, and 0 deleted. Nothing happened. 

magento 2 CE import history page

Solution:

The CSV needed to be saved as UTC-8
In excel click File –> Save As –> Choose CSV UTF-8 (Comma delimited) (*.csv)