The category channel is a group of attributes that tell advertisers about the topic on a page.
Peer39 semantically classifies pages in advertiser-focused categories and sub-categories, giving visibility into where ads are showing.
Subcategories are available for many top level categories, however the top level categories encompass more than just the sub categories. For example, the Personal Finance category breaks down into these sub categories:
Other personal finance pages that don’t fall into one of these subcategories are included in the top level category umbrella. (For example: pages with topics about debt reduction or saving for college)
Create categories that are unique to the brand or campaign by overlaying keywords on selected categories.