How to add the widget to a sidebar

To display a widget on a sidebar, you should go to Theme Options > Templates > Open your template (ex: Shop layout template) > Layout

Edit the sidebar element > Choose a widget for the sidebar

Edit the sidebar element

Choose a widget for the sidebar

In case you're not interested in displaying a sidebar on pages, you just need to delete the sidebar element by clicking on the trash icon.

After that, click on the grid icon to adjust the grid layout again.