There are three different types of VSRs:
The Veterans Service Representative
The Supervising Veterans Service Representative
The Rating Veterans Service Representative
If your claim is waiting under VSR Review, it might mean your claim is in one of these three channels. Afterwards, a decision will be made and they will notify you.
This is from the VSR review page at https://heroanswers.org/119/what-is-a-vsr-review for more information.