
Keyword Stuffing
The more often you use your keywords on a page, the higher you keyword density. However, search engines don’t look for exceptionally high keyword density, but reasonable keyword density. If you repeat your keywords too often, search engines might think that your website is spamming.
Cloaking is when websites serve one web page to search engine spiders and a different to human visitors. This can be used to mislead the search engine with regard to the content on the website. There are, however, some methods of cloaking which are not regarded as a deceptive, such as delivering unique content to users based on their location, or allowing search engines to index password protected pages.
Another method of deceiving search engines with regard to a website’s content is by including hidden text. Text can be rendered invisible by setting it as the same color as the background, using negative margins, or placing it in an invisible containing element.
Gateway Pages
This occurs when a user, or search engine, is unknowingly redirected to another website. Sometimes this practice is used to acquire the pagerank of the destination page. At other times, it is used to redirect users to a malicious website.
Link Farms
Search engines have gotten progressively smarter in their quest to deliver highly relevant search results. So even if these tactics give you some success, it will only be temporary and could result in an indefinite ban of your domain name.
1. Increase Your Linkability
2. Make Tagging and Bookmarking easy
3. Reward Inbound Links
4. Help Your Content Travel
Ref: http://dailyseoupdates.com/avoid-getting-banned-in-se/


