Breadcrumbs is simply a path to a product that is represented with the reference of the Magento store map. Learn how to show breadcrumbs in Magento CMS pages.
Magento 1 and Magento 2 by default offers to enable the breadcrumbs in the store for easy navigation.
For more info: https://meetanshi.com/blog/show-breadcrumbs-for-magento-cms-pages/