Create a custom sidebar
You can create them in the Theme Options by providing a name of the custom sidebar.
Remember, to not use special characters or the following names: buddy, events, forum, shop. Those are registered names for already used sidebars.
Populating the sidebars
Appending content into the sidebar is easier than you can imagine, it’s using the Wordpress widgets with a drag&drop option, which makes creating it very smooth and friendly.
Do not create a custom sidebar for woocommerce. After installing that plugin it creates it by the default.
Use the sidebar named Plugin | Woocommerce which can be found in the widgets tab.
Assigning the sidebar
There are multiple possibilities to include them on a page.
Display one sidebar on all pages/posts
It's simple, just select on which side you want to see it and provide the name of sidebar you want to display.
Display sidebar on single page or post
While editing a page, you can select the side of sidebar and which one should be displayed. You will find this option just under the Muffin Builder.