Search Engine Advertising is a term that is inherently confusing. Some use this term interchangeably with Sponsored Search or Pay Per Click Advertising as in Google Adwords. Of course, these are actual advertisements that are tied to specific keyword phrases. As such they are targeted advertisements because they are only viewed based on the keyword itself. Others use this term to mean Organic Search Engine Optimization or SEO which in fact are not advertisements. Rather, these are listings based strictly on relevance as rated by the search engines themselves. These listings are not purchased or bid upon like PPC; they are earned through highly sophisticated optimization techniques. Successful Organic Optimization results in highly visible listings with no cost to the website owner no matter how many times the listing is displayed or clicked.