White Hat SEO
In search engine optimization terminology, White Hat SEO refers to the usage of SEO strategies, techniques,that focus on a human audience opposed to search engines and completely follows Search Engine rules and policies.White Hat SEO is natural and organic SEO.
White Hat SEO is a practice used to improve search performance that is in line with terms and conditions of a search engine.
White Hat SEO is the opposite of Black Hat SEO.These tactics stay within the bounds as defiend by Google. Examples include:
>Offering quality content and services
>Using descriptive, keyword-rich meta tag
>using backlink / Link building
>Making your site easy to navigate
I've written an article about SEO in more details, you can read it here