You can export products in your "Products" area in your E-Commerce Module.

"Export to CSV"

"Export Inventory"

"Advanced Export to CSV"

"Export to Google Merchant Center"

See screenshot:

When you are on your products page you can export products in a couple of ways.

"Export to CSV"

"Export Inventory"

"Advanced Export to CSV"

"Export to Google Merchant Center"

First thing to understand about this process is if you do a search on the left hand side of this area, and then click any of the export options it will only export the items from the search results.  If you wish to export all of your items then you should click the "Show All" button prior to doing an export.

Export to CSV

Will export all of the products listed from the search.  It will include all fields that you have for your products. (Fields are "SKU", "Description", "Price", etc...)

Export Inventory

Will export all of the QOH for the results listed. ( it will show the sku and QOH of that sku)

Advanced Export to CSV

This option will export all of the items shown from the search.  But will allow you to choose what fields to export. (This can come in handy if you are only looking to update pricing for example.  Then you may only want to export the title or sku, and the price field.  To keep the file small and easier to update)

See screenshot:

Export to Google Merchant Center

also see this video

This option allows you to export to Google Merchant Center.  And set the mapped fields here. This will save a .txt file that you can import to Google Merchant Center.  (Note: be sure the fields match how you want them to be linked in Google Merchant Center)

See screenshot:

Once you click on "Export" in any of these scenario's it will either prompt you to save the file (if it is small enough) or it will go to "scheduled tasks" and create the file for you there.  Once completed it will have a link for you to click and downlaod your file.  The link will expire soon after creation.