Blekko search engine has announced that it has now blocked 1.1 million web sites from its search results using a new system it calls "AdSpam," and new pages from any web site won't be added if they don't pass muster.
"AdSpam, in short," is a machine-learning algorithm that examines pages for a specific spam signals -- the presence of multiple display ad positions on a single page and thin to zero content. Unlike algorithms used by other search engines, AdSpam is being used in conjunction with human curation to detect to continue the War on Spam.
So in a time where spam-free search is becoming increasingly important, you can be sure that Blekko's new AdSpam technology will scan every new page on the Web before it gets added to Blekko search results. We believe the way to better search results is by using an algorithm that was created to kill spam, not just crawl it."
"This new technology will dramatically change search. It's the first search algorithm ever created to find spam rather than rank results. The algorithm is specifically designed to recognize pages which are spam and eliminate them before they ever appear in search results," said Blekko.
Blekko's CEO Rich Skrenta, confirmed the ban, "top 20 spam sites from blekko's index entirely, based on our users click /spam on results." This includes ehow.com, one of Demand Media's top revenue generating web sites.