A sidebar in WordPress is a widgetized section of a website where secondary content can be displayed. Sidebars typically appear alongside the main content area and can contain various widgets. Key points about sidebars:

  • Can be customized with different widgets for different pages or sections
  • Often used for navigation, search functionality, or displaying recent posts
  • Can be positioned on the left, right, or both sides of the main content
  • Some themes allow for multiple sidebars or footer widget areas

Sidebars can be managed through the Customizer or by using plugins like Custom Sidebars.