Plug Wallet is designed for everyday use on the Internet Computer. It allows users to:
Hold and manage various IC tokens (ICP, NFTs, SNS tokens, and other ICRC tokens).
Swap tokens, store and manage NFTs, and interact with dApps.
On the other hand, the NNS (Network Nervous System) is primarily a governance wallet that only supports ICP and SNS tokens. It is used to:
Participate in Internet Computer governance by staking ICP tokens, voting on proposals, and managing neurons.