A digital or new media agency is a business that delivers services for the creative and technical development of internet based products. These services range from the more generalist such as web design, e-mail marketing and microsites etc. to the more specialist such as viral campaigns, banner advertising, search engine optimization, podcasting, widget development and mobile or social applications.
These agencies tend to differ from their more traditional advertising agency and marketing agency counterparts in that they rarely deliver offline work. Advertising and Marketing agencies do however, deliver digital work, often using outside sources.