Nofollow Attribute

Blogspot has been upgraded on 18 January 2005 when the Google blog entry "Preventing comment spam" declared that Google will henceforth respect a rel="nofollow" attribute on hyperlinks. Their page ranking algorithm now avoids links with this attribute when ranking the destination page. The intended result is that site administrators can easily modify user-posted links such that the attribute is present, and thus an attempt to googlebomb by posting a link on such a site would yield no increase in that link's rank.