Product types in Kentico CMS are fully customizable document types used to create products of multiple representations. Specifically, they define the structure of documents that are associated with SKU objects, thus allowing to present the actual product articles and services to your on-line store customers on the live website. Same as any other document type, each product type may have its own:
•fields (data structure)
•editing form layout
and other settings.
You can use the built-in product types, e.g. Product - Computer, Product -TV, Product - T-shirt, etc., and you can also set up your custom ones.