Saving implies locking the crypto assets in a proof-of -stake blockchain for a certain period of time at a very simple stage. These locked assets are used to reach agreement, which is needed to protect the network and ensure that any new transaction is written to the blockchain for validation.
After effective saving, with more MYFI tokens, you should be able to see rewards available rise over time. This rewards will be in form of MYFI tokens. Tokens can be claimed at any moment using rewards for claims. Other than that, saving tokens with no lockup can also be un-saved at any time after the given time of saving are completed.