To make a website SEO friendly can be a tricky thing, especially when there are those who believe that there is no need to adhere to moral or ethical bylines and proceed with either excessive enthusiasm (a.k.a. aggressiveness) or dubious behavior. Dubious behavior in terms of SEO is also known as black hat, coat, or cloak SEO; meanwhile its counterpart is known with the same terms, just with the color white. Naturally.
Black SEO is not rule abiding, and people who are participants in such actions are usually aware that the websites that they are applying their dark rules to will eventually get punished, usually in the form of suspension or banning from the search engines; as a result, they will introduce their websites in a paced manner. This way, when they are excluded from a search engine, they will have another one to submit to.
White SEO, as it would be expected, abides by the rules and guidelines that are placed on each search engine, so their results are long lasting regardless of the “back door actions” of those black SEO practitioners. The white SEO are characterized by writing the content of the websites first for the human surfers and then enhancing such contents for SEO and not the other way around.