Should the top navigation of an e-commerce site be duplicated in the side nav or should that area be reserved for filters only?

For example
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  • To enable a better answer, provide a little more context. It looks like you're talking about an ecommerce site. Is filtering going to be a critical product discovery feature of the site. Will you need a lot of space for the filters? are extensive sub-categories a part of the info architecture. Commented May 15, 2015 at 22:57
  • Yes, I am talking about an e-commerce site. Well, filtering is probably a very important feature to any e-commerce site so that people are able to search for what they are looking for. But what I mean is that if you see the top nav says "shop, denim, ready to wear, etc." is it necessary for it to be on the left side nav as well or should i be strictly filtering?
    – Priya
    Commented May 22, 2015 at 20:22

1 Answer 1


Don't waste space or create confusion

When you duplicate information, you make the user look at it twice. This creates some disorientation. You can treat the top categories like tabs then expose their sub-categories at the top portion of your left nav. This has the benefit of encouraging subcategory discovery and providing a sense of place within the taxonomy. In a sense, they are the highest order filters of the parent category.

Filter controls are not critical for all ecomm, but fashion shoppers tend rely on them more than most. With that in mind, keep subcategory lists short ('view more' to expand lesser categories can help) so the filters gain exposure to capture more interaction. It may seem obvious, but keep in mind that users who filter typically convert higher.

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