In order to access this feature, you need to navigate to the theme customizer page where the settings below are available.
The theme features up to 6 widget locations where you can add your widgets – Main Sidebar, WooCommerce Sidebar, and 4 Footer locations. Firstly, you will need to enable these locations. The Main Sidebar and WooCommerce Sidebar widget areas are enabled when you select the website layout with a sidebar. Footer widgets locations you can enable in the footer section of the customizer.
After you set the widget locations for your website now you can proceed to the addition of the widget. To add a widget to a location please navigate to the Widgets section where you can add the required widgets. The widgets you can also add in Appearance - Widgets admin page.