Breadcrumbs in the context of internet marketing and SEO refer to a navigational tool that helps users understand their current location on a website and easily navigate back to previous pages. They are typically displayed as a trail of clickable links, usually located at the top of a webpage, showing the hierarchical structure of the website. Breadcrumbs enhance user experience, improve website navigation, and can also benefit search engine optimization by providing search engines with a clear understanding of the website’s structure and hierarchy.