Sidebars
Choose reusable content for the native Sidebar system.
Sidebars hold supporting content beside the main Page or Post when the selected layout uses one.
Choose the position
Use Site Design to select no Sidebar, a left Sidebar or a right Sidebar when the active layout supports it.
Choose the content
A Sidebar can include supported items such as Navigation, Queries, Forms, Components or Tag lists.
Keep it secondary
Use Sidebars for supporting navigation and related information. Important page content should remain in the main content column.