After you pressed the “update database” button, the products in the import file will be added to the database and you will see the result of the import procedure. The displayed information includes, how many products were added, how many products were updated and what fields were used when importing the products.
The import results:

If, for any reason, some products weren’t updated or added, or if errors where encountered during the import procedure you will get an error message to help you correct the error.
After this step, you can either choose to upload more products, or browse your products to check, if the imported products were added or updated correctly.