If you have a business & you need a site. If you have site then you must need search engine marketing. Logically, this makes sense. In the practical world of internet marketing, however, search engine marketing is a very broad term. It comprises of a wide variety of things.
When most people use the phrase, they are really saying something else to a marketing company like ours. What they are saying is I need exposure for my site. I need to get people from the search engines to my site.