The defining characteristic of vital creativity is that it brings value to your audience. The value you bring can take on many different forms. It could be a service, a product, information, inspiration, the list goes on and on. Regardless of the type of value you bring, it must be helpful to your specific niche audience.
If what you're creating does not bring value to those who follow you, then it's not vitally creative. If you can figure out how to bring that value though, then you’ll be one step closer to making the impact you desire.