Search Engine Marketing
Search engine marketing, (SEM), is a form of Internet marketing that seeks to promote websites by increasing their visibility in search engine result pages (SERPs) through the use of paid placement, contextual advertising, and paid inclusion.
Keyword research and analysis:
Make sure the site can be indexed in the search engines.
Find the most relevant and popular key terms and phrases for the site and its products.
Use those key phrases on the site in a way that will generate and convert traffic.