In order to get more information about the products uploaded, errors & alerts or suggestions on how to improve your performance, please, log in to the Google Merchant Center and check the Products section.
Products -> Resources, used to add new Google Shopping data feeds or adjust the settings of the existing ones.
Products -> All products will give you a list preview of all items uploaded with status description per item. By clicking on the Edit Column icon you will be able to configure the structure of your report before downloading it.
Products -> Diagnostics is probably the most important resource on your Merchant Center, pretty useful to quickly spot items, account or data feed source problems. You can define intervals to instantly generate a report & check your improvements over time.