Question - What is the propose of getSharedDependencies?

[rkchoudhury]

Just wanted to clarify the following similar doubts.

1. What is the propose of getSharedDependencies?
2. Can we add all the packages that are being used in the host and mfes level in the dependencies.json file?
   1. Does it impact the app bundle size?
   2. Or do need to follow any pattern to specify the dependencies in the dependencies.json file?
   3. If we specify a dependency in dependencies.json file and host package.json file then can we use that dependency in all the mfes without specifying in the respective mfe package.json file?