I think a good use of language is important. Precise and vivid words can make the story more engaging. Also, a clear message in the story helps the audience understand the point easily. For example, if it's a story about innovation, the message about what the innovation is and how it benefits should be clear. And consistency in the narrative style throughout different stories can also be a key element.
One key element is the ability to target the right audience. SocialChorus probably studies the demographics, interests, and values of their target audience. Then, they tailor the stories to match those aspects. For example, if their audience is mainly young professionals, they might tell stories that focus on career growth, new technologies in the workplace, and how to balance work and life. They also might use platforms and mediums that are popular among this group to tell their stories effectively.
The key element could be authenticity. When stories are genuine, they are more likely to resonate with the audience.