Search engine marketing, also known as SEM, is a form of Internet marketing that aims to promote websites by increasing their visibility in search engine result pages through the use of paid placement, contextual advertising, and paid inclusion.

SEM has become one of the most powerful tools for any moden business that has an online presence. Here are five companies which offer search engine marketing services:

1. SEOValley
2. Tangence
3. Search Marketing Group
4. Vayu Media
5. Webrageous Studios