Google blacklists

Search engine decides BMW's German site violates guidelines by using technique that may boost its rating artificially.

Google has blacklisted after the carmaker violated the search giant's guidelines by using a technique that could artificially boost its search engine rating, according to a Google engineer.

In a blog, Google software engineer Matt Cutts said that Google had removed BMW's German site from its Web index after the site included "doorway pages" that would automatically redirect visitors to a different URL.

Cutts explained that when Google's crawlers visited a BMW page, it saw blocks of text with repeated key search words such as "neuwagen," which means "new car" in German. However, when a user visited the listed page they would be automatically redirected to another page with less text and more pictures, which was more attractive than the page the crawler saw, but would have scored lower in Google's PageRank system.

"This is a violation of our Webmaster quality guidelines, specifically the principle of 'Don't deceive your users or present different content to search engines than you display to users,'" Cutts' blog said.

To regain Google listing status, Cutts expects that will have to remove the JavaScript that redirects users around the site in this fashion and then send a reinclusion request to Google's Webspam team, which Cutts leads. has already removed some of the redirect pages.

BMW may also have to disclose details of who created the doorway pages--and assure Google "that such pages won't reappear on the sites"--before the domains can be reincluded, Cutts said.

The German site of technology product vendor Ricoh is also due to be removed from Google "for similar reasons," Cutts said.

BMW and Ricoh were unavailable for immediate comment.

Tom Espiner of ZDNet UK reported from London.

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