To fully understand search engine marketing, I believe that is a must to first understand the concept of how internet marketing is used for website marketing. Furthermore, I believe that it is important to also understand the history of search engine marketing, how search engine marketing firms came about, and the results different search engine marketing companies try to obtain for their clients.
First of all, we must all know that no website serves its purpose if it does not have any visitors. Therefore, if you can get more visitors to your website (using different forms of website marketing), the better off you are and the more likely you are of reaching your internet marketing goals.
Secondly, it is important to know that when the internet started becoming a commonly used medium among the general public, back in the early 90's; there were almost no major search engine marketing companies, except a few internet marketing companies, of which some are still doing web site marketing until today.
Therefore, with the ever increasing number of websites, the demand for professional search engine marketing began to increase, which caused for the creation of more and more internet marketing firms.
Nowadays, there are several hundred website marketing companies. Some internet marketing companies specialize in website advertising, while others work to obtain press coverage for websites, and yet others focus solely on search engine marketing.