Puro has two widget ready areas. Go to AppearanceWidgets where you can add widgets to the sidebar and footer widget areas. If no widgets are added to the sidebar widget area, the sidebar will not display. The footer widget area will automatically split into equal width columns as widgets are added. For example, if you add two widgets, two columns will be created.
If you’d like to use a rich text editor in widget areas, please see our documentation page on the Black Studio TinyMCE.