Black hat seo techniques

Black Hat (seo) search engine optimization is unethical technique. Black hat seo techniques are used to get highest search rankings, high page ranking, more visitors within short time period. Black hat SEO techniques usually break search engine rules and algorithms.so search engine will banned like that kind of websites and 

create poor user experience.

1.) Hidden text

2.)301 redirects

3.)Cloaking

4.)Paid links

5.)Keyword stuffing

6.)Scraping

7.)Duplicate content

8.)Doorway pages

9.)spaming