Search Engine Optimization ranking is determined by many factors and is rated based on the algorithms of the search engine. Their algorithms are always changing to meet the needs of their visitors. Search Engine Optimization is one of the most common forms of internet marketing and has been around since the beginning of the internet. Search Engine Optimization marketing is a very effective, free tool to place your content in front of millions of people. The goal of course is for more people to see your content, which will result in more sales.