I want to know some information about black Hat SEO So,Kindly tell me that which of the methods does black Hat SEO covers.

There are many practices that are considered Black Hat tactics. Some of the top things are:

Massive Link Farming
Keyword Stuffing
Redirecting/Cloaking
Hiding text on a site

The search engines are becoming smart enough to look for these techniques.

bmac

Top 5 methods:
1. Hidden Content
2. Meta Keyword Stuffing
3. Meta Keywords
4. Doorway or Gateway Pages
5. Link Farming

I know all the methods of black hat seo. But the most use methods are clocking and doorway pages. Above mentioned methods are also very popular for black hat seo. But I use only two methods for black hat seo.

Black Hat SEO is more frequently used by those who are looking for a quick financial return on their Web site, rather than a long-term investment on their Web site. Most Black Hat SEO is done through software, so be wary of any SEO company that uses software to post articles or create links for you.

Black hat seo is used to get higher search rankings.
Methods of black hat seo are:
*Hidden text
*Keyword stuffing
*Duplicate content on multiple domains
*Doorway pages
*Link forming
*Hacking sites

I think black hat seo method is wrong method to promote website. I advice to please don't use this method.