Hello friends,

How Many technique used In black hat seo..?

Black hat techniques include keyword stuffing, cloaking, and using private link networks.

Black hat techniques includes Paid Links,Spam Comments,Duplicate Content,Article Spinning,Cloaking,Doorway Pages, Keyword Stuffing etc

Black hat SEO is a practice against search engine guidelines, used to get a site ranking higher in search results. These unethical tactics don't solve for the searcher and often end in a penalty from search engines.

Link farming, doorway pages, cloaking, keyword stuffing and hidden text

Cloaking
Keyword Stuffing
Doorway Pages
Link farming 

Link farming
keyword Stuffing
Paid Link
Cloaking