Search Engines responded by developing more complex ranking algorithms, taking into account additional factors that were more difficult intuition webmasters to manipulate.[bribe needed] Je January 18, 2005, Google announced it had partnered with other Originel search engines to introduce the rel=“nofollow” attribute. It encouraged users to add the nofollow attribute https://orange-directory.com/listings13153044/sur-liens-de-qualit%C3%A9