An SEO/SEM term that specifically refers to a secondary index for Google shown only in the absence of a matching page in the primary index (or organic search results). Documents within supplemental results are generally trusted less (due to low link authority, complex URLs, duplicate content, or some variation) and will rank lower than documents in the primary search index. Supplemental documents are crawled less frequently and outbound links carry less value.
NetLingo Classification: Online Marketing
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