Please never use black hat
SEO techniques. They are strategies to deceive Google and other search engines so you get undue, unethical advantage for your website. Eventually you will be found out ad your site will be blacklisted. A blacklisted website will lose traffic and be penalized with low ranking in the Google search engine results. Please stay away from black hat. It may give quick results but can affect your website in the long run. Also, black hat is not good for consumers. It gives consumers a distorted placement of information.