1. The big picture. Before you get started with individual tricks and tactics, take a step back and learn about the “big picture” of SEO. The goal of SEO is to optimize your site so that it ranks higher in searches relevant to your industry; there are many ways to do this, but almost everything boils down to improving your relevance and authority. Your relevance is a measure of how appropriate your content is for an incoming query (and can be tweaked with keyword selection and content creation), and your authority is a measure of how trustworthy Google views your site to be (which can be improved with inbound links, brand mentions, high-quality content, and solid UI metrics).
An SEO technique is considered white hat if it conforms to the search engines' guidelines and involves no deception. As the search engine guidelines are not written as a series of rules or commandments, this is an important distinction to note. White hat SEO is not just about following guidelines, but is about ensuring that the content a search engine indexes and subsequently ranks is the same content a user will see. White hat advice is generally summed up as creating content for users, not for search engines, and then making that content easily accessible to the online "spider" algorithms, rather than attempting to trick the algorithm from its intended purpose. White hat SEO is in many ways similar to web development that promotes accessibility, although the two are not identical.
SEO techniques can be classified into two broad categories: techniques that search engine companies recommend as part of good design ("white hat"), and those techniques of which search engines do not approve ("black hat"). The search engines attempt to minimize the effect of the latter, among them spamdexing. Industry commentators have classified these methods, and the practitioners who employ them, as either white hat SEO, or black hat SEO. White hats tend to produce results that last a long time, whereas black hats anticipate that their sites may eventually be banned either temporarily or permanently once the search engines discover what they are doing.