a) Editor/Content Creation - this person works on the content calendar and creates the posts for a specific channel (think Facebook, Instagram, or Twitter accounts). In some agencies, they have a duo for this: someone who writes the copy and someone who works on the design
b) Community Manager - this person engages with the audience, replying to the posts and addressing questions/concerns from your followers. May or may not relate to customer support, it depends on the nature of the brand
c) Listening/Insights - this individual analyzes data and comes up with insights on your publications, as well as identifying opportunities.
d) Ads/Media Buying - this individual is responsible for the media plan, and developing strategies to optimize advertising investment.
e) Social Media Strategist - a broader role, someone who develops a strategy and partners with the other teams to execute that on campaigns or overall brand positioning.
In my experience, you don't need to be interested in social media to understand social media strategy, but for job satisfaction, if that is your career, you'll experience greater satisfaction with an interest in social media. Still, social media marketing is about leveraging social and community aspects to connect and communicate with prospects to achieve some measurable marketing result.
I was a communication major and I am very satisfied with the life marketing and advertising has given me. If you're smart, creative, hard-working, a good speaker and communicator, the opportunities are endless.
Tonya recommends the following next steps: