02-24-2012, 06:05 AM
Search Engine Marketing (SEM) is a form of internet marketing which promotes websites by increasing their visibility in SERPs. This can be accomplished with the use of paid placement, contextual advertising, and paid inclusion. Depending on the situation, SEM can be an effective means of marketing a website including SEO or to contrast with SEO in order to focus on just paid components. There are 4 categories of tools which can be used to optimize a website - keyword research and analysis, website saturation and popularity, back end tools and Who Is tools. Google, Yahoo!, ask.com, Baidu, etc. are some of the search engines with SEM programs.