Magento Open Source 2.2.x
Configuring Layered Navigation

The layered navigationThe primary group of web page links that a customer uses to navigate around the website; the navigation links to the most important categories or pages on an online store. configuration determines if a product count appears in parentheses after each attributeA characteristic or property of a product; anything that describes a product. Examples of product attributes include color, size, weight, and price., and the size of the step calculation that is used in price navigation.

To configure layered navigation:

1. On the Admin sidebar, tap Stores. Then under Settings, choose Configuration.
2. In the panel on the left, expand the Catalog section. Then choose Catalog.
3. Expand the Layered Navigation section, and do the following:
a. To display the number of products found for each attribute, set Display Product Count to “Yes.” If necessary, first clear the Use system value checkbox.
b. Set Price Navigation Step Calculation to “Automatic (equalize price ranges).” If necessary, first clear the Use system value checkbox.
4. When complete, tap  Save Config .