By the name itself, we can determine that, these are incorrect SEO techniques, which are used to manipulate the search engine indexes. Earlier, SEO people use to practice these techniques to grade high in SERP. But, now these techniques, won't work, because of Google new algos. Now, if you want to outrank your site in SERP, then you have to use white hat SEO techniques.
This post has been edited by aaront555: Mar 21 2014, 06:16 AM