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New HTML Tag Attribute Helps Block Comment Spam

Posted by TimSlavin at February 20, 2005

"If you're a blogger (or a blog reader), you're painfully familiar with people who try to raise their own websites' search engine rankings by submitting linked blog comments like "Visit my discount pharmaceuticals site." This is called comment spam, we don't like it either, and we've been testing a new tag that blocks it. From now on, when Google sees the attribute (rel="nofollow") on hyperlinks, those links won't get any credit when we rank websites in our search results. This isn't a negative vote for the site where the comment was posted; it's just a way to make sure that spammers get no benefit from abusing public areas like blog comments, trackbacks, and referrer lists."

Google has developed a simple tag that its search bots use to help prevent comment spam from clogging up their search engine. And they've got MSN and Yahoo! to agree to the technique as well as several weblogging tools.

Found on the Pivot site (a blogging tool) which I found through a German site, .
URLs:

http://www.google.com/googleblog/2005/01/preventing-comment-spam.html


http://www.pivotlog.net/


http://www.emailmarketingblog.de/

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