(much of this post is re-produced from articles found online and from Google.com)
One technique, known as black hat SEO or spamdexing, use methods such as link farms and keyword stuffing that tend to harm search engine user experience. Search engines look for sites that employ these techniques and may remove them from their indices.
The term “search engine friendly” may be used to describe web site designs, menus, content management systems, URLs, and shopping carts that are easy to optimize.
SEO techniques can be classified into two broad categories: techniques that search engines recommend as part of good design and those techniques that search engines do not approve of and attempt to minimize the effect of, referred to as spamdexing. Industry commentators have classified these methods, and the practitioners who employ them, as either white hat SEO, or black hat SEO. White hats tend to produce results that last a long time, whereas black hats anticipate that their sites may eventually be banned either temporarily or permanently once the search engines discover what they are doing.
An SEO technique is considered white hat if it conforms to the search engines’ guidelines and involves no deception. White hat SEO is not just about following guidelines, but is about ensuring that the content a search engine indexes and subsequently ranks is the same content a user will see. White hat advice is generally summed up as creating content for users, not for search engines, and then making that content easily accessible to the spiders, rather than attempting to trick the algorithm from its intended purpose. White hat SEO is in many ways similar to web development that promotes accessibility, although the two are not identical.
****** Many of ecarlist’s competitors are doing Black Hat SEO ******
Black hat SEO attempts to improve rankings in ways that are disapproved of by the search engines, or involve deception. One black hat technique uses text that is hidden, either as text colored similar to the background, in an invisible div, or positioned off screen. Another method gives a different page depending on whether the page is being requested by a human visitor or a search engine, a technique known as cloaking.
Search engines may penalize sites they discover using black hat methods, either by reducing their rankings or eliminating their listings from their databases altogether. Such penalties can be applied either automatically by the search engines’ algorithms, or by a manual site review. One example is BMW of Germany.
Something from Google.
While SEOs can provide clients with valuable services, some unethical SEOs have given the industry a black eye through their overly aggressive marketing efforts and their attempts to manipulate search engine results in unfair ways. Practices that violate our guidelines may result in your site being removed from the Google index. Here are some things to consider:
* Be wary of SEO firms and web consultants or agencies that send you email out of the blue.
Amazingly, Google gets these spam emails too:
“Dear google.com,
I visited your website and noticed that you are not listed in most of the major search engines and directories…”
Reserve the same skepticism for unsolicited email about search engines as you do for “burn fat at night” diet pills or requests to help transfer funds from deposed dictators.
* No one can guarantee a #1 ranking on Google.
Beware of SEOs that claim to guarantee rankings, allege a “special relationship” with Google, or advertise a “priority submit” to Google. There is no priority submit for Google. In fact, the only way to submit a site to Google directly is through our Add URL page or by submitting a Sitemap and you can do this yourself at no cost whatsoever.
* Be careful if a company is secretive or won’t clearly explain what they intend to do.
Ask for explanations if something is unclear. If an SEO creates deceptive or misleading content on your behalf, such as doorway pages or “throwaway” domains, your site could be removed entirely from Google’s index. Ultimately, you are responsible for the actions of any companies you hire, so it’s best to be sure you know exactly how they intend to “help” you.
