A web wallet is one such wallet. You do not need to use any additional applications to save it. It is much safer. In my opinion, web wallet is much better than mobile wallet. Using it does not require a separate space. Hopefully the wallet will expand further in the future.
Most web wallets don't allow you to hold private keys and that's why it's not a good basis and say that it's better than mobile wallet. As long as your wallet doesn't provide you private keys, that's not a good wallet.
But If you intend to store large amounts of crypto for long periods of time,then i would suggest cold storage methods like Ledger Nano X which is probably the best choice.
Even the old Nano S is still fine though.