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