Use the formula below to calculate keyword seasonality:Seasonality = Keyword search volume in a particular month / Average annual keyword search volume. Every page in the catalog hierarchy should link to the parent category page to create topic silos for every product category. Product pages and subcategory pages should link to other pages of the same level within one topic silo. Every page in the catalog hierarchy should link to the parent category page to create topic silos for every product category. Product page contentA good product page should describe the key features of the product and showcase what it looks like.