What is “Search Engine Optimization” (SEO) or “Search Engine Marketing” (SEM)?
Search Engine Marketing (SEM) is the art and science of marketing a web site via search engines and directories, through improving organic rankings by making a site more search-engine friendly and purchasing paid listings through pay-per-click or pay-per-performance methodologies. Search Engine Optimization (SEO) specifically refers to organic, crawler-based listings of search engines and occurs though changes made to a website’s code and content.