ASURVEY ON W EB SPAM DETECTION M ETHODS : TAXONOMY

Web spam refers to some techniques, which try to manipulate search engine ranking algorithms in order to raise web page position in search engine results. In the best case, spammers encourage viewers to visit their sites, and provide undeserved advertisement gains to the page owner. In the worst case, they use malicious contents in their pages and try to ins tall malware on the victim’s machine. Spammers use three kinds of spamming techniques to get higher score in ranking. These techniq ues are Link based techniques, hiding techniques and Content-based techniques. Existing spam pages cause distrust to search engine results. This not only wastes the time of visitors, but also wastes lots of search engine resources. Hence spam detection methods have been proposed as a solution for web spam in order to reduce negative effects of spam pages. Experimental results sh ow that some of these techniques are working well and can find spam pages more accurate than the others. This paper classifies web spam techniques and the related detection methods.