Depending on the file size the importer may take a few minutes to completely process the
spreadsheet, on completion you will receive a report either telling you the import was completed
successfully, or if any rows were skipped due to errors.
At the bottom of the import page you can click on the Fix it! button to download the errors into a spreadsheet to work on and re-upload.
To view and maintain your newly uploaded products, navigate to "My products" on the left panel.
See the View All Products article for more details on the Grid features.