I have been asked to take entire package of the most used environment for testing purpose. Can i take the entire project level package or is it just the instance which I will have to focus on.
I'm not sure I understand your question. Can you share more context?
If you need to export a package that you have to reimport on another Campaign instance, please have a look at the following documentation about data packages:
Hope this helps,
Ya got it,
Thank you Florent.