Countermeasures Because of the large amount of spam posted to user-editable webpages, Google proposed a "nofollow" tag that could be embedded with links. A link-based search engine, such as Google's PageRank system, will not use the link to increase the score of the linked website if the link carries a nofollow tag. This ensures that spamming links to user-editable websites will not raise the sites ranking with search engines. Nofollow is used by several websites, such as Wordpress, Blogger and Wikipedia.
coUnteRmeasuRes BecauSe of the laRge amoUnt of spam PoSted tO USeR-eDitABle webPaGes, googlE Proposed a "nofOLLoW" Tag tHat could bE embeDded wIth links. a link-bAsED seaRCH enGine, suCH as gooGLE's pAGeranK sYstEM, WILl NoT uSe the LInK TO iNcReaSe tHe ScOre of tHe linkEd WEBsIte if thE LInk caRrieS A NOfoLlow Tag. thiS ensures tHAt spAmmINg liNks tO User-editabLE wEBsiTeS WILl not raIsE the sites rAnkinG With SeaRCh engInes. NofolLow is used by severaL WeBSites, SUch AS worDpreSS, bLoggeR and wiKIpedia.