SEM

SEM is a broader term than SEO, and is used to encompass different options available to use a search engine’s technology, including

paid ads. SEM is often used to describe acts associated with researching, submitting and positioning a website within search engines.  It includes things such as search engine optimization, paid listings and other search-engine related services and functions that will increase exposure and traffic to your Web site.

SEM offers you the opportunity to pay based on clicks (you pay only for each click through from the advertisement to your Web site). Ads in a successful SEM campaign will be shown to those consumers specifically looking for your products or services, resulting in a higher conversion rate.