Okay if I import a model into blender, will the import change if I change the source file that I imported from? The model is in blender if you want to know. Do I just have to reimport it?
Yes and no. If you export an fbx and your .blend is stored outside the assets folder then yes, you will need to replace it. If you have your .blend file stored in your assets and the Unity it handling the import then no. If you open the .blend, edit and save, when you switch back to Unity it will updated it automatically.
Thank you guy! You helped me out a lot!