What is Black Hat Seo ? And how many techniques used in it ?
 

What is Black Hat Seo ? And how many techniques used in it ?

In search engine optimization (SEO) terminology, black hat SEO refers to the use of aggressive SEO strategies, techniques and tactics that focus only on search engines and not a human audience, and usually does not obey search engines guidelines.

Hidden Content
Meta Keyword Stuffing
Doorway or Gateway Pages
Link Farming
Cloaking
Paid links
Page jacking
Multiple subdomains
Deceptive headline
Hacking sites

Black Hat SEO only effect for a temporary. These techniques are not recommend for you.

Black hat SEO is a practice that increases a page's rank in search engines through means that violate the search engines' terms of service. The term "black hat" originated in Western movies to distinguish the "bad guys" from the "good guys," who wore white hats (see white hat SEO). Recently, it's used more commonly to describe computer hackers, virus creators, and those who perform unethical actions with computers.
Black Hat SEO Techniques
• Link Manipulation - Buying links, advertorials, and link schemes
• Article Spinning
• Link Schemes
• Link Farms
• Link Wheels
• Link Networks
• Rich Snippet Markup Spam
• Automated Queries to Google
• Creating pages, subdomains, or domains with duplicate content
• Pages with malicious behavior, such as phishing, viruses, trojans, and other malware.

but this technique is very helpful at all

Paid links
Page jacking
Multiple subdomains
Deceptive headline
Hacking sites
Rich Snippet Markup Spam
Link Farms
Link Wheels
Link Networks etc.........

Black hat SEO is a type of unscrupulous search engine optimization tactic used to raise a website's search engine results page ranking illegitimately.