Hi all,
A lot of people ask what the differences are between the following types of marketing companies:
Advertising Agencies
Ad Agencies
Marketing Agencies
Interactive Agencies
Iteractive Advertising Agencies
Interactive Marketing Agencies
Search Engine Marketing
And so on, and so on...
I put together a lens in Squidoo that explains various business models in the Marketing/Advertising Industry and what their responsibilities are. Keep in mind that there is much overlap. Some companies may carry the same title, but provide a wide variety of services while others are tightly niched.
The article can be seen here:
My interactive marketing agency Squidoo lens
If you have any questions or would like to offer additional insight, please do.
Thanks in advance,
Chris turnquist- CEO, Proteus Design Studio

Although we specialize in social media marketing strategies, we also offer the following outstanding services in support of your overall marketing goals:
Interactive, Internet Marketing
Web 2.0 and Social Media Services
Website Promotion
Website Services
Graphic Design Services