Basically the search engine optimization techniques are differentiated in to two types. The main important technique is white hat technique, which is providing a favorable result and used for long-term profits. The blackhat is nothing but the technique, which is not to use by others, and technique, which is prohibited. Seo techniques are used only for maintaining the web traffic. The link sharing and link building techniques are the direct technique to develop the ranking of the websites. The blackhat seo techniques are the indirect techniques, which is also used to increase the rank of the website. According to the rank of the website, search engine displays the result. If the rank of the website is good then it displays first other website come after that website. Some of the companies using the unfair techniques and bring their website to higher rank. Some of the leading companies using this blackhat techniques in the past but now they changed their approach. This is achieved with the help of blackhat techniques. Some of the crucial techniques involved in the blackhat are stuffing the keywords, gateway pages, cookie, invisible, pay per click (ppc) etc. Using these techniques some of the website get profited immorally. This is strictly banned by the Google and by some major search engines.