> ## Documentation Index
> Fetch the complete documentation index at: https://docs.withbind.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Product Categories
> Categories allow the specification of Item weight, which is utilized for the Item shipping weight calculation.
## About
Categories allow Admins and Employees to set the weight attribute (in grams) for each Product type. The name attribute of a Category corresponds to the type value of a Shopify product, and the Category's weight is utilized to calculate the shipping rate for a Product upon the creation of the Shopify product. The existing Products within our Catalog belong to a pre-set Category. These Categories exist by default and do not require any additional setup.
The main attributes of a Category are:
* **Category Name**: The Category's name that will be selected while using the [Create Product](/platform/catalog/create-product) feature.
* **Weight (grams)**: The Category's weight in grams.
## Create Category
Categories may be created by both Admins and Employees. Click the **Create Category** button from within the table, and a modal will appear. A custom Category allows you to set a different weight for a Product than is assigned to the default Category for a product type. This is helpful if the product has a higher weight.
## Update Category
Updates can be made to both default and custom Categories, but only the weight attribute can be modified, as the name of a Category is immutable. Click the **Update** button from within the table, and a modal will appear.
