Search Engine Land :: Has someone filed a large number of DMCA “takedown” requests against your site? If so, look out. That’s the latest penalty that may cause you to rank lower in Google’s search results. It joins other penalties such as “Panda” and “Penguin.” We’re dubbing it the “Emanuel Update” in honor of Hollywood mogul Ari Emanuel, who helped prompt it.
Emanuel Update explained - A report by Danny Sullivan, searchengineland.com
If you like to understand which sites will be affected, visit Google's Transparency Report to browse the list of copyright removal requests, specified domains here: