Blackhat SEO is one of the techniques that is used to increase a website visibility in SERPs that can violate the search engines terms .

Black seo is the technique refers to bring the website to the 1st page of the search engine in short period of time without following the google guidelines

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.