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You are looking at site structure. You want it to make sense and you want to link from the broad subject down to the specifics. Example:  Shoes > Women's Shoes > High Heels > Brand Name High Heel Shoe The reciprocal linking in the content of each page can become confusing if your Shoes page is linking anchor text "High Heel shoes" to the High Heels page, while the High Heels page is linking to anchor text "shoes" back to the  shoes page. I believe that the best way to establish your pyramid is through breadcrumb links, and URL structure. Folders can be useful for defining hierarchy. The pages you cross link must make sense to users. Dropping in a "Children's Toy" link on a High Heels page doesn't usually make sense. Whenever you consider doing something for "keyword optimization" or "ranking" you need to consider how does this benefit a user.