You may have noticed on Google lately that some of the listings are starting to show slightly different details on the results. They’re putting breadcrumbs in, to help people see exactly what categories those results fit into. How can you tell? Instead of showing the blatant web site address, they’re putting greater than signs (“>”) between categories in that space. That way, you know what site the page belongs to, but you don’t know the specific address, you know the categories the subpage that has shown belongs to.
This is one way Google has adjusted their algorithm to help users navigate the search engine results pages, but how else can you use breadcrumbs, in your own site? One of my favorite internet marketers Ann Smarty has a detailed explanation on Search Engine Journal. The key is to make sure you use them to help the user, not to help the search engines (a good rule to follow in general).