A breadcrumb feature is a secondary navigation scheme that comes in handy for revealing users location on a web page or website. Users will be able to locate the web pages that they want to view. It also allows users to keep track of there location on a website.
Click on Dashboard>Appearance> Customize> Theme Customization> Breadcrumb
Enable breadcrumb is the option to either enable or disable websites breadcrumb feature. It is by default enabled. You can disable it if you do not want your users to reveal their location regarding which page they are on the website. Breadcrumb is a secondary type of navigation and it is better to have it enabled.
Note: Breadcrumb is not visible in front page or home page of a website. It will be visible when you are visiting blog posts and other pages beside the front page.