Google appears to be testing breadcrumbs in some search results, at least in some areas. If you are unfamiliar with the term breadcrumbs, it refers to the hierarchical display commonly used in site navigation. For example: Home Page>Product Page>Product A Page. Several bloggers have noticed Google displaying these types of breadcrumbs in various places in seemingly random results to some queries.
Google’s use of breadcrumbs appears to only be a test, and a limited one at that. Google has talked repeatedly about sites having good site architecture in the past. This allows Google to more easily and quickly crawl sites.

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