What is Whitehat SEO and Backhat SEo
 

someone can tell me the definition and different between them?

Don't use Blackhat SEO. It can ruin your website. Google can penalize your website for using Blackhat techniques to get better ranking.

Always use White Hat SEO technique to get real human traffic on your website.

Whitehat seo is the legal Technic and Blackhat seo is the illegal Technic.

Black hat also has an advantage. They can make your site number one in no time but hardly can help your sell your product.

In search engine optimization (SEO) terminology, white hat SEO refers to the usage of optimization strategies, techniques and tactics that focus on a human audience opposed to search engines and completely follows search engine rules and policies. ... Also called Ethical SEO.
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

White hat seo is the legal Technique and Black hat seo is the illegal Technique.