When creating products for your store on Orderchamp, there are certain requirements for the way that you categorise a product. Let's start off by defining the difference between a category and a sub-category.
A category is a group to which your products are assigned based on similarity or defined criteria. Orderchamp has six categories: Home & Living, Fashion Accessories, Beauty & Health, Luggage & Bags, Stationary and Kids & Baby. A sub-category is a more narrow, or a subclass of a category.
You will be limited to assigning the product to a maximum of 3 sub-categories, that are a part of a maximum of 2 categories when creating a product.
If you are listing a pillow in your store, you may choose to only assign the product to one category, 'Home & Living', with two sub-categories 'Pillows & Blankets' and 'Home Decor.
If you are listing a product such as a baby blanket though, you may want to assign this product two separate categories, 'Home & Living' and 'Kids & Baby'. Under 'Home & Living' it would makes sense to use the sub-category 'Pillows & Blankets' while under 'Kids & Baby' it would makes sense to use the sub-category 'Accessories' and even a third sub-category if needed from from either the 'Home & Living' or 'Kids & Baby' category.
Choosing the right (sub-)category
Put yourself in the consumer's shoes. Think of the sub-categories that you use for each product as 'search terms' or 'labels' that the consumer would use to find your products, and then pick the most relevant (sub-)categories.