Breadcrumbs serves the purpose of displaying the current page or context within a website or application. Breadcrumbs are essential as they show the hierarchy and navigational context, enabling users to understand their location within different levels of the site or app structure.

By visually indicating the user's position, Breadcrumbs allow for easy navigation back through the levels or categories. They are particularly useful for pages that are deeply nested within the site's hierarchy, providing users with links to higher-level pages.