This is the create/edit/view screen for Merchandise products.  See Concepts|Products for background information.

The fields are as follows:
Id - the ID of the product
Name - its name
Printed Name - the name that will be displayed when the invoice etc is printed. If omitted, then the Name will be used.
Selling Units - the units by which this is sold (eg Unit, Ampoule, Bottle, Box, etc). The available choices are set by the Administrator|Lookups|Units of Measure screen.
Active - uncheck this box to deactivate the product

See Tabs for a description of the fields in the various tabs.