In addition to the standard layered navigation, anchor categories appear in an additional section that lets you filter the list by attribute value. The attribute section of layered navigation appears if the category is set to “Is Anchor.” Each attribute can be configured to display the results, which is the number of matching records found.
The attribute properties, combined with the product properties, determine which attributes can be used as filters for layered navigation. Only those with the catalog input type of Dropdown, Multiple Select or Price can be used as filterable attributes. In addition, the number of anchor categories and filterable attributes you have available is determined by your Magento Go plan.
|Magento Go Plan||Categories|
Setting up anchored layered navigation is a two-step process. First, you need to set up the filterable attributes. Then, make the category an anchor.