Black hat SEO is a collective term used to describe unethical methods that are implemented by unscrupulous webmasters to increase the rankings of their own or their clients’ sites in organic search results. Also called web spamming, black hat SEO is against the rules and regulations of all the major search engines, because the techniques used for achieving the high rankings unjustly seek to manipulate search algorithms. These techniques show web content to search bots in a way to manipulate them to assign higher values other than what the pages actually deserve. At the end, they ruin Internet users’ search experience, and subsequently make a mess of the overall integrity of SERPs (search engine results pages).
There are several forms of black hat search engine optimization, but the two (2) common ones are keyword stuffing and spamdexing.
Keyword stuffing is the overly use of a long list of irrelevant keywords on web pages, masked as genuine content, with the sole intent to deceive search algorithms to “think” those key terms are relevant to the associated pages. Another form of keyword stuffing is cloaking – the use of an iframe or the same background color to mask texts, mischievously making them invisible to humans but visible to search spiders. This is most often the case when a webmaster wants to include almost all the keywords and key phrases either or not relevant to his/her pages content. Showing one set of content to human visitors and another to search bots is against the search engine guidelines to webmasters and it has some consequences.
Before you take black hat SEO route, be aware that all the major search engines, such as Google, Bing, Yahoo, Blekko and Ask have gotten smarter in recent years and are now capable of filtering out stuffed keywords. Even if it takes a little more time before one of the search engines detects it, your exaltation on search results will surely be transient. When one search engine detects the offence, it would just be a matter of time before others pick it up as well.
Web spam, also called search engine spam and spamdexing, is a method of repeating unrelated terms in the content of web pages, with the sole purpose of manipulating the prominence of indexed pages by Internet search engines. This black hat technique is not consistent with search algorithmic indexing/ranking, and it does not strive to improve the quality of content served to Internet users on search engine results pages (SERPs).
All the major search engines like Google, Yahoo, Blekko, Ask and Bing have crafted web spam and keyword stuffing filters they use for detecting black hat SEO offenses. So, you risk being penalized and your site’s pages de-indexed, if you engage in any unacceptable SEO practices.