Internet or online yellow pages are the interactive version of their print directory forebears, with the added advantage of offering greater flexibility in searching for business listings. In 2005 there were 1.8 billion look-ups in online yellow pages, in addition to 14.5 billion references to print directories.

With more Americans than ever routinely using online search tools, Internet Yellow Pages have become an essential factor in local search advertising media plans. Advertisers can choose from a variety of ad units including listings, display buttons and dedicated web pages.