If you don’t want to be banned by Google or other search engines, or if you are having trouble being indexed by search engines, take these Search Engine Optimization (SEO) tricks / practices that has been used and are being used, to heart.
1- Cloaking: Using specific software programs to send search engine spiders to alternative pages that are not seen by the user. These pages mislead the spider, encouraging it to deliver results based on these pages rather than the actual pages the public sees on the site. By doing this, companies look to gain positions through what search engines feel is deception or spamming. Spamming is a serious offense in the eyes of the search engines, likely resulting in permanent banning of your site because search engines feel it can discredit the results served.
2- Doorway/Gateway/Bridge Pages: Low-quality pages used when companies want to position well for a specific key term at a specific search engine.
3- Hidden Text: Incorporates the most popular key terms into the colored background of your web site’s pages to trick the Search Engines by appearing as highly keyword relevant site.
4- Promotional Domains/Mini Web Sites: If they exist on the provider’s server, they control all the work they have done for your site, rather than you owning it. It is possible that a Search Engine Optimization (SEO) could hold your work hostage. Additionally, these domains will not contribute to the position of your primary domain, which is one of the main goals of a good Search Engine Optimization (SEO) program.
5- Irrelevant words: Loading web pages with irrelevant words in an attempt to increase a web page’s keyword density. This includes stuffing ALT tags that users are unlikely to view. (MSN)
6- Link Farms: To artificially increase the number of links to your page. (MSN) Link farms look like a directory (a list of SEO firm’s clients) that is added to every client site.
7- Illegal Content: Any content that violates a local, regional, national and international law can be banned from Search engines.
8- Broken Links: Linking to documents or URLs that return “404-Page Not Found” can impact the web site negatively in terns of ranking.
9- Mini Net Links: Faking link popularity hinged on creating your own network of sites and then linking them back to your main site. Remember, it is easy for anyone who owns a site by viewing that site’s whois information. Google and Yahoo are domain registrars. Although it’s easy to hide this information by registering your whois info as private, there’s reason to believe that with suspicion domains that make use of this privacy option, you are taking a risk.