The interviewer is looking for a better idea on the type of writing, research, and journalism work you like to do. Perhaps you want to write factual, unbiased pieces related to current events. Or, maybe you prefer to write about the entertainment industry, pop culture, or other lighthearted pieces where you can better incorporate your personality.
Whichever style of writing you prefer, be sure to show the interviewer that you have enthusiasm for your work. Avoid pigeonholing yourself into just one type of writing by mentioning that your writing style is flexible and diverse.