Search Engine Optimization (SEO) is often considered the more technical part of Web promotion. This is true because SEO does help in the promotion of sites and at the same time it requires some technical knowledge - at least fluency with basic HTML. SEO is sometimes also called SEO copyrighting because most of the techniques that are used to promote sites in search engines deal with text. Generally, SEO can be defined as the activity of optimizing Web pages or whole sites in order to make them more search engine-friendly, thus getting higher positions in search results.
One of the basic truths in SEO is that even if you do all the things that are necessary to do, this does not automatically guarantee you top ratings but if you neglect basic rules, this certainly will not go unnoticed. Also, if you set realistic goals - i.e to get into the top 30 results in Google for a particular keyword, rather than be the number one for 10 keywords in 5 search engines, you will feel happier and more satisfied with your results.
Although SEO helps to increase the traffic to one's site, SEO is not advertising. Of course, you can be included in paid search results for given keywords but basically the idea behind the SEO techniques is to get top placement because your site is relevant to a particular search term, not because you pay.
SEO can be a 30-minute job or a permanent activity. Sometimes it is enough to do some generic SEO in order to get high in search engines - for instance, if you are a leader for rare keywords, then you do not have a lot to do in order to get decent placement. But in most cases, if you really want to be at the top, you need to pay special attention to SEO and devote significant amounts of time and effort to it. Even if you plan to do some basic SEO, it is essential that you understand how search engines work and which items are most important in SEO.