Features are used to add categorized, hierarchical content to your site. They can be linked to products to add additional pages of information for your product, and can be protected with access keys to require subscriptions. With features, you can create a complete online magazine, or use it as a simple CMS system. Using access keys and memberships, you can even sell subscriptions to your content! Dealing with features is fairly similar to products, as they both fall under the same category structure.