9. Product Types
To be able to choose a product type you should open the drop-down list during product creation. You shouk select the necessary one:
"Simple Product" is any product that you can sell. This type has the "General", "Inventory", "Shipping", "Linked", "Attributes" and "Advanced" tabs for filling.
"Grouped Product" is a product that contains the simple ones, combined (grouped) by the specific property. For example, clothing can be grouped by model, size or color, a monitor can be grouped by the screen resolution or brand.
Once you selected a "Grouped Product" type during product creation, the "General" and "Shipping" tabs will disappear and you will have to fill the "Inventory", "Linked Products", "Attributes" and "Advanced" tabs in the "Product Data" form.
"External/Affiliate Product" is the type of a product available in your product list with main information, such as description, price value, assigned attributes etc., but in order to acquire it you have to specify the link to another place, where it can be purchased.
After choosing this product type the "Inventory" and "Shipping" tabs will disappear from the main tabs list. In the "Product Data" form, you have to specify the full URL path to the current product.
"Variable Product" is the product type that consists of different variations. Each of them can have their own price value, quantity or number (SKU). For example, the one size of a dress has different color variations and, conversely, the one color of the appropriate dress represented in various sizes.
Check the following guides from the useful article page to get mode details on Product types in WooCommerce:
WooCommerce Product Types: Detailed Insight