According to me, White Hat SEO also known as Ethical SEO is a clean method, techniques that are used to draw visitors by following search engine rules, regulation & policies. Some white hat methods are keyword analysis, back linking, link building to improve link popularity, and writing simple and impressive content for readers. Also, those who want to make a long-term investment prefers white hat seo.

White hat SEO improve usability or accessibility of the site while it also improve SEO Factors.

White hat SEO not only may improve PageRank score but it good practice and should be espoused by internet marketers. Back Hat SEO should be avoided at all costs.

Another way of saying it is that white hat SEO is a term to describe techniques and activities that will not get you in trouble with the search engines. Its alternative, black hat SEO covers those techniques and activities that will cause harm to your site ranking and are detrimental to the goals of your company.

As for what those techniques are, white hat or black hat, they are documented throughout the web and here at DaniWeb. You just need to do your homework.

it is the ethical SEO that follows the rulesof any Search engine

According to my way
White hat technique to Search Engine Optimization consists of ethical methods of search engine optimization which are recommended by search engines as part of good design. Some of the most popular white hat techniques are:
• Quality Content
• Use of Relevant Keywords
• Use Structural (Semantic) Mark Up and Separate Content from Presentation
• Proper use of Titles and Meta Data
• Keyword Research and Effective Keyword Use
• Quality Inbound Links

White hat search engine optimization is considered following the rules and regulations by the worlds leading search engines including Google, A recent report says around 60-% seo companies do not use legal search engine optimization methods. When we say white hat seo, we mean natural search engine optimization helps you get organic search engine rankings.

The natural optimization may look time taking but simply impressive, gone are the days when Google was so very much kind to everyone out there, in order to improve the search engine result pages, Google and other search engines has set different penalties for such webmasters or seo companies that use illegal methods of search engine optimization

There are white, grey, and blackhat methods of SEO. Whitehat is legitimate, ethical, and the only way SEO should be done. Greyhat mixes the white and blackhat techniques. And blackhat abuses SEO by trying to build backlinks/traffic unethically, via bots or spamming.

Grey Hat SEO? I like that name. It's very hard to get on top only with white hat..