Product-specific attributes are properties that distinguish some particular product from the rest in your store and are, therefore, configured on the level of this specific product.
A store admin can view the list and manage product-specific attributes in the "Product-Specific" section of the "Attributes" tab of the product details page in the Admin area:
Product-specific attributes can either be added manually on a per-product basis or imported for multiple products at once.
Read on: