Ad Agencies
There are several advertising agencies that help medium size businesses and large brands understand how contextual advertising options affect their advertising plans.
There Are Three Main Components to Online Advertising That Ad Agencies Will Sell Solutions for:
1. Creation
What the advertisement looks like. Ad agencies have creative departments whose job it is to both conceptualize ad concepts and design or create ad campaigns.
2. Media Planning
Where the advertisements are to be run.
Ad agencies, if you can afford them, will take a clients budget and plan a blanket approach across all forms of media, TV, radio, Publications and both desktop and mobile Internet to achieve maximum exposure for campaigns, whilst leveraging the different mediums for the best buzz / viral effect.
3. Media Buying
Media buyers specialize in buying ad space across different media.
You will learn more about how that's done in terms of Internet advertising below.