Content Development encompasses brainstorming, researching, data gathering, and planning delivery methods as it relates to content preparation before publication. Examples could include finding images to go along with a particular post, recording and editing a phone interview before posting online, or it could even be something as small as citing different resources from around the web to include in a new blog post.
Being a wordsmith will only get you so far when it comes to creating great web copy. Having the ability to entice users with creative hooks, keeping them reading on the page with broken up content, and writing to entertain and educate, are all part of developing rockstar content. However, simple text will only go so far without great visuals and/or audio.
Images and video are key when it comes to keeping people on page and engaged. Not only do they help break up the page, but they can improve conversion rates, be humorous, but increase relevancy not only from a users standpoint, but also from the search engines view as well.