We can say that Black Hat search engine optimization is a technique that is used to get higher search rankings in an unethical manner. Those techniques usually include some of the these characteristics:
1) search engine rules and regulations are breaked
2) poor user experience is created directly SEO techniques utilized on the Web page
3) unethicall presentation of content in a visual or non-visual way to search engine spiders and search engine users
A lot of what is known as black hat SEO actually used to be legit, but some folks went a bit overboard and now these techniques are frowned upon by the general SEO community at large. These black hat SEO practices will actually provide short-term gains in terms of rankings, but if you are discovered utilizing these spammy techniques on your Web site, you run the risk of being penalized by search engines. Black hat SEO basically is a short-sighted solution to a long-term problem, which is creating a Web site that provides both a great user experience and all that goes with that.Although the basic principle of operation of all search engines is the same, the minor differences between them lead to major changes in results relevancy. For different search engines different factors are important. There were times, when SEO experts joked that the algorithms of Bing are intentionally made just the opposite of those of Google. While this might have a grain of truth, it is a matter a fact that the major search engines like different stuff and if you plan to conquer more than one of them, you need to optimize carefully.There are many examples of the differences between search engines. For instance, for Yahoo! and Bing, on-page keyword factors are of primary importance, while for Google links are very, very important. Also, for Google sites are like wine – the older, the better, while Yahoo! generally has no expressed preference towards sites and domains with tradition. Thus you might need more time till your site gets mature to be admitted to the top in Google, than in Yahoo!.Ethical search engines optimization is all about optimising a website for visitors, not for search engines. But yes, we can’t forget that we are optimizing for website’s search engines rankings. In this way, we need to use only ethical methods and white hat seo techniques.