SEO's cheating ways

1. Meta SPAM: in the  Meta  tag keywords repeated
2. Doorway Page: establishment of deliberately deceiving the search engines page site with low points
3. Repeat of keywords: In the article repeatedly or deliberately keyword Hide
4. A large number of improper link: In order to increase the link, link farms from the large number of Links to websites, to improve website Ranking
5. Transparent Hidden text or keywords: Users do not see a Web page keywords, designed for a search Engine to increase keyword density