Black Hat search engine optimization

Black Hat search engine optimization is customarily defined as techniques that are used to get higher search rankings in an unethical manner. These black hat SEO techniques usually include one or more of the following characteristics:
• breaks search engine rules and regulations
• creates a poor user experience directly because of the black hat SEO techniques utilized on the Web site
• unethically presents content in a different visual or non-visual way to search engine spiders and search engine users.

i like this point about black hat seo thanks for sharing !!