How to Add or Remove Sidebar in WordPress | WordPress Sidebar Tutorial
1. Log into your WordPress dashboard.
2. Go to Appearance Widgets.
3. On the left side, you will see a list of available widgets. Drag and drop the widgets you want to add to the Sidebar section.
4. To remove a widget, simply click on the widget and then click on the Delete link.
5. When you are done, click on the Save Changes button at the bottom of the page.
Your Sidebar is now updated with the widgets you added or removed.