Your Wagerr wallet connects directly to the Wagerr network. This improves security and privacy, but also means sometimes your wallet can get out of sync with the network.
Syncing with the blockchain can take a lot of time, and usually isn't necessary. If someone sent you Wagerr and it shows as confirmed in the blockchain yet it is not appearing in your wallet, your wallet may be out of sync. First, check to make sure the address the Wagerr was sent to is correct.
If you are trying to send Wagerr and constantly get error messages that your transaction was rejected, it could also mean your wallet is out of sync.
In either of this cases, using this feature will rescan the blockchain to find your Wagerr and display it properly in your wallet.