What is a marketing job?

[Malik]

I'm really interested in the idea of a marketing job, but I'm not exactly sure what it entails. I'm a keen graphic designer and qualified a few years ago. I've worked free lance on and off since then but nothing full time. (Not the greatest paying job) but I have always been interesting in marketing. I love the idea of being the front of a company. I'm not sure if this is exactly marketing or branding or something else all together.

I want to be they guy designing the adverts, creating the flyers and posters promoting the company. Updating the social networking sites.

Can anyone give me any advise on what job title that actually or if even such a job exists?

Thanks