What is the difference between organic search (SEO) and sponsored listings (SEM)?
Using Google as an example, the left hand side is used for listing organic search results (although a blue box containing Sponsored Links is often placed at the top of the left hand side) and is based on the proprietary relevancy calculation employed by the search engine. These listings are not for sale and cannot be impacted directly through Search Engine Marketing. The top and right hand sides are used for sponsored results. These results are available for purchase and are based on the keywords that are searched. Availability is driven by the searching behavior of consumers.
