Search Engine Marketing(SEM) is defined by the set of tools, techniques and strategies that help optimize the visibility of websites and web pages through search engines. In short, the goal of SEM is to gain better search engine positioning on Google and other similar sites. It is a very effective way to increase your presence in search engines and attract highly qualified traffic to your website.
SEM, which uses PAID strategies to appear in search
Search Engine Optimization (SEO)
Search Engine Advertising
Paid Submission