Who owns Category Definition in the store anyways? Determining the best definition for categories (including their segments) is one of the core foundations in category management. In its simplest form, defining categories is about what items belong in a category based on Shopper expectations — and this responsibility belongs to the Retailer. It sounds like an easy task, but in practice, it is not because there are many considerations in this strategic component of category management. Here are some great resources from CMKG for you to get started: Category Definition & Segmentation course preview (video) Category Definition complimentary download Category Definition & Segmentation certified course details Before you define your categories, read these 3 considerations.