Hello all,
I visited more than 10 different sites and forums to know about SEO method. But now I am totally confused and frustrated about this topic. I don't know how many method still there in SEO. I know anly few names like White Hat, Black Hat, Brown Hat but could you please make a easy description all of them and except white hat which one is the best and effective for my website and for my online marketing? Any answer would be highly appreciated. Thanks in advance. Have a nice day !!!
Kashfiya !!! 
Hi there :)
I am not sure that Brown Hat exists as a real SEO technique. Maybe you were referring to the Gray Hat technique?
The easiest way to explain White/Gray/Black SEO Techniques is to say that White Hat is a technique where you make pages for human users, Black Hat is where you create pages for search engines, and Gray one is somewhere in the middle. So, if you're using a White Hat technique, you will create content relevant to your domain name and keywords used on the page, your backlinks will also be real, the content will be useful for the visitors and your site will be generally user friendly. If you are using the Black Hat technique, you will have plenty of hidden keywords, white texts on white background, misleading menus and content, and your backlinks will be all over the internet no matter of the content on your page. White Hat technique requires quite a lot of work while Black ones don't. Still, Black Hat techniques are illegal (not in front of the law but in front of the search engines) and your page will most likely be blacklisted and banned from search engines listings. This is why Gray Hat exist - it is actually a fine balancing between hard work and illegal techniques so you can eventually end up high on search engines listings and not banned from them.
This would be a short practical explanation of White/Gray/Black Hat (there are way more parameters and methods included in each, but that is the topic for the book and not one post).
Here comes the fun part

However, those SEO techniques were 'invented' a long time ago and many things have changed. You can just forget everything you know about the White/Gray/Black Hat and start learning SEO from the scratch. Search engines are smarter than ever and Black Hat is practically dead - you'll get blacklisted and banned from search engines as soon as your page is indexed. Also, SEO trends are changing fast and at this moment everything is about the user friendly websites with high quality (preferably long) content and quality (and if possible social media) backlinks.