User ID and Password of Web Wallet and Mobile wallet is synced. In order to sync the wallet itself so that same wallet can be shown in both Web Wallet and Mobile Wallet.
Please refer here:
https://support.moonstake.io/hc/en-us/articles/360001976915-Sync-your-wallet
(*) When performing the procedure, at the step to set a password, please set the same password if you would like to unify the passwords for your sychronized accounts