Search Engine Forums, SEO Forum

Which techniques are considered as black hat techniques????
I am just aware about the submission stuff in SEO. I never came across or learned any thing else.
So I would like to what is exactly Black Hat.????
Is the submission in directories, articles, blogs and forums considered as white hat???

Hi..
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 rules. For example, keyword stuffing, invisible text and doorway pages.

Black hat seo is the unethical way of optimizing a website. This method includes keyword stuffing, creation of doorway pages, cloaking, duplicate content, etc.