Attributes

To be able to select what you want in a product, WooCommerce has to know what the options are. These options are called attributes and they can be found in Product data | Attributes:

There are two types of attributes:

• Custom product attribute
• Global attribute

Functionally speaking, they're almost identical. The biggest difference is that global attributes can be reused between products where custom product attributes have to be created for each product, which means a lot less typing on your end. 

Another difference is that global product attributes can be used for filtering. So, if you have filters on the shop page to help users to navigate your products, you can filter by specific attributes and this can only be done with global product attributes. If you have a product with unique attributes that no other product will have, then it's convenient to use the custom product attributes:

1. Let's add a global product attribute under Products | Attributes.
2. Add a Name for the attribute. The attribute is the name of the categorization, for example, colours, sizes, and cuts—not red, small, or v-neck:

3. Then, click on Configure terms. This will let you configure individual values.
4. Now, go ahead and add your values, for example, Red, Blue, and Green:

Now, let's take a look at variations for the products.