Global Sidebar Position: This option works on all archive pages like: 404, search, date, category, blog, and so on. You can choose either Right sidebar or Left sidebar or No Sidebar.

Post Sidebar Position: This option works only on single posts. You can choose eitherthe  Right sidebar or Left sidebar or No Sidebar.

Page Sidebar Position: This option works only on a single page. You can choose either the Right sidebar or Left sidebar or No Sidebar.