If you search google you will see ~37K indexed domains/pages using this exact same param. I don't know where this param comes from.

What is causing this?

  • Are you seeing this with your own site? Curious, if I do a site: search on the top result, then none of those URLs are returned. (?) – MrWhite Mar 8 '16 at 22:11
  • Interesting. Many (but not all) of these results also have "?publisher=4846312192" in their title element; if you change the URL, these sites display the changed string in their title, too. – unor Mar 9 '16 at 3:03
  • i have seen this on a clients domain in webmaster tools, returning as a duplicate, which is not really an issue, since we can manage that, just found it very curious finding that many sites, with seemingly no relation are indexed with the exact same query string... the mystery continues ;) – sgraham Mar 9 '16 at 21:50

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