The Storefront WooCommerce Customizer extension gives you additional style and layout options for the WooCommerce sections of your Storefront powered web site.
Installation

Unzip and upload the plugin’s folder to your /wp-content/plugins/ directory
Activate the extension through the ‘Plugins’ menu in WordPress
Enter the WordPress Customizer to begin using the plugin.

General configuration
This extension integrates with the WordPress Customizer making it extremely simple to use. Once you enter the Customizer by going to Appearance > Customize, you will notice several new top-level sections; Shop, Product Details and Homepage. In addition to this, there are new settings in the Header and Homepage sections. The settings should be self-explanatory but let’s work through what each one does. In the following sections.