Click on the ‘Customers’ link on the left side navigation bar, then click on ‘ Or, Import from file ‘ (next to the green ‘+Add’ Button.
Troubleshoot
If you are getting an error when importing your excel or csv file, it is likely that a certain field or column is missing from the file.
Instead of creating a brand new csv file, you can download a sample file from the Customer Import Page, and fill it out with your own data. This approach will minimize issues from a bad file structure.