Black Hat and gray hat

[sinelogixtech]

Black hat SEO refers to the use of aggressive SEO strategies, that focus only on search engines and not a human audience, and usually does not obey search engines guidelines. It try to outsmart search engines and bring organic traffic to their websites without following any rules, but breaking them instead.

Grey Hat SEO is the practice of using technically legal methods to improve your site rankings, but which are ethically dubious, and could one day become black hat. Think of it like legal highs.