Julian Canino
Julian Canino voted up
Sem is the main topic in online marketing and performance marketing channels like affiliate marketing, newsletter marketing and search services like seo and sea (search engine advertising) is a sem agency. A good sem agency has a lot of search and sem services like www.crossoverpoint.de  - regards sema
Julian Canino
Julian Canino voted up Anonymous' answer

Search engine marketing (SEM) is a form of Internet marketing that involves the promotion of websites by increasing their visibility in search engine results pages (SERPs) primarily through paid advertising. SEM may incorporate search engine optimization(SEO), which adjusts or rewrites website content and site architecture to achieve a higher ranking in search engine results pages … Read more