What is Breadcrumb Navigation
Breadcrumb Navigation is a user interface which shows the current page location. This is a very good feature for a website. This helps to improve user experience and SEO of your website. Drupal has this feature inbuilt.
Where Breadcrumb Navigation Links appear in theme
Breadcrumb Navigation should appear just below page title as shown in below image. But you may put it in any other block region.
How To Show Breadcrumb navigation
Navigate to:
Home 
Administration Structure Block layout
example.com/admin/structure/block
Place Breadcrumbs block in Page Header region.
How To Hide Breadcrumb navigation
To hide Breadcrumbs, put it in Hidden blocks region or disable this block.
Breadcrumb Position
You can set its position to Left / Center / Right from theme settings.
Navigate to:
Home Administration Appearance Appearance settings Ruhi
example.com/admin/appearance/settings/ruhi
