Data journalism is an ambiguous term and likely you'll get 18 different explanations by asking 18 different people. But in general, you could think of it as the new possibilities that arise when you combine traditional journalistic skills (being curious & skeptical, asking questions, talking to people, finding powerful narratives, telling compelling stories) and the explosion of new digital information and tools.
Data stories themselves can be about any topic, but often, they focud on trends and exceptions. A story about rising income inequality or affirmative action bans across America are both data stories — they tell us about trends using statistics and data analysis. But a story about the one university that saddles its students with thousands in debt or the couple doctors that charge way more for the same procedures are also data stories — they tell us about outliers or exceptions.
Data stories can also take on a multitude of forms. Sometimes the data appears in the form of a long traditional investigative story, providing the context and specific numbers that form the backbone of the piece. Other times the data will appear in the form of a chart or interactive graphic that illustrates a paticular point. Other times the data will appear in the form of an interactive database that let's users search for their own city or school or hospital and tell their own story in the data.
Now, whatever the topic or form, remember that data journalism is not the same as merely throwing up a lot of data on a webpage. In other words, data journalism is not: "Here's some data, hope you find something interesting!" Data journalism is about helping people understand what's important about the data, why it matters, what it means for you and what it means for us. That's the real "journalism" in data journalism.
Data can help you answer questions that regular reporting can't do (or it would take a million years). So you automatically put yourself in a position to do stories that other journalists can't do. Think about that!
Sometimes the data can be hard to collect. Almost all stories will require effort to get the data. Sometimes you have to collect it yourself. Sometimes it comes from the government and you have to reformat, analyze & mash it up with other data sets. And other times you have to scrape it off of really annoying websites like this one. We'll talk more about scraping soon.
Data can come from lots of different places
Ok, but why should I bother with coding?