1. Cloaking--a Black Hat SEO technique. Cloaking tries to deceive search engines into presenting the relevant site with a higher ranking and the URL provided in a search engine result may turn out to be different if clicked by visitors or search engine users. The displayed address in a search engine result may go into an irrelevant or pornographic content.
Google search engine considered cloaking as deceptive technique and for that reason; websites that uses deceptive cloaking violates the rules and regulation of Google search engine spider.
2. Cross linking the two sites simultaneously. Linking one website to another related content should not be done only for search engine result position in aiming for higher ranking purposes. The use of cross-linking is to help the readers or visitors in providing them URL addresses that are linked to other related websites. This technique is not bad because it gives concern to the visitors by providing them hyperlink that might help or give them extra information on a specific subject.
It is good; however, you must be conscious that your page rank should not be affected because if cross linking is overdone or abused, then, your website is in trouble. Just be clever in cross linking and follow Google's webmaster guidelines.
3. Hiding text or links on website's page. Hidden texts and links goes against with Google's rules because it is a textual content that cannot be seen by your visitors. However, it is still exposed through search engines and it is identified as search spam by Google search engine.
If your website contains hidden text and links, it follows that your website may be removed from the Google index, and may not appear in search results pages. Eliminate them without any delay or change the HTML code into a readable text that can be easily viewed or seen by your visitors.
4. Linking to the penalized website's page. There are instances that you have mistakenly or even purposely linked into a penalized or link farm websites. Link farming is another process of search engine optimization which increases website's total number of external sites that linked into it. In concept, the more demand of reciprocal link exchange, the higher the ranking you will get in the search engine results especially in Google. However, Google avoids websites that joins link farms because Google considered link farming as a spam and your website will be removed right away in the index.
If your website talks about movie reviews and you include links to the actor's personal sites, fan sites, and links to stores that sells original CD/DVD copies of any movies, it does not violates Google. Thus, it is not a link farm. Your website provides access to other websites that may give interest to your visitors.
However, if you are registered with a service that makes more than a hundred inbound links to your website alone, and in return, requires you to add a hundred outbound links, it is a link farm. Instead of linking to other related information from your website, you are presenting your readers links about pills, casino, x-rated films and other absolutely unrelated information from your website.
5. Repetition of words in meta tags or keyword stuffing. Filling up repetitive keywords in every corner of your website's pages will be penalized by Google. An alternative text for your images is encouraged but stuffing alternative text with hundreds of keywords violates the rules. Keyword stuffing technique tries to raise its position in the search engine result and this will become visible to visitors.
The keyword stuffing method is not effective. Involved website may be removed from Google's search engine index. Some keyword stuffing is less noticeable, similar in using of invisible text on a page. However, this invisible texts can still be traced by the spiders. Thus, it is another Google Page Rank penalty.
