Keyword stuffing, doorway pages gives the bad effect on Page Rank. it`s also bad for websites visibility on the web.
blackhat seo will get you nowhere. Many people before have tried to out trick google who have failed. And when they do, they usually lose all the profits they have earned
black hat seo is techniques that are used to get higher search rankings in an unethical manner. it breaks search engine rules and regulations.its creating a Web site that provides both a great user experience and all that goes with that. black hat SEO practices will actually provide short-term gains in terms of rankings.
Black Hat SEO is usually defined as the techniques or systems that are being used in arrange to rank higher on different search engines using prohibited strategy and ways. It also called as unethical SEO. Black hat SEO methods can provide a site a short term gains in terms of ranking unlike white hat SEO that can give a site a long term gains in terms of ranking.
Black hat seo is process of unethical SEO. If we want the fast keyword ranking on SERP then we use black hat seo process. Blact hat process is not gud way to promote bcoz google penalize the sites.
you can say Black Hat SEO to any spammy way of marketing , using softwares to create thousands links automatically etc.