"When you apply to be a content writer, employers will interview you on your writing proficiency, reading comprehension skills, ability to write in multiple styles and formats, and creativity. Bring a portfolio to the interview that you can use to show the interviewer your skill in writing diverse styles. Some employers may expect you to know your way around popular web programming languages such as HTML and CSS."
What's your experience with online content creation?
Minimal honestly. But in school I did contribute sparingly to a newsletter that covered local restaurants in the area. It was a small, college town so it gave me a chance to work pretty closely with the business owners.