NWC lets your social media apps remote control your cashu.me wallet
So if you want to zap someone's post on nostr, instead of clicking the zap button and then scanning a qr code with cashu.me, NWC can reach out to your cashu.me wallet and click the "send" button *for* you *and* enter the zap invoice *and* hit confirm, all without you needing to do anything
Same goes for receiving payments: if someone wants to zap *you,* NWC can let their wallet reach out to yours, get an invoice from it, and show it to them to pay it -- all without you needing to do anything
NWC streamlines the use of a lightning wallet without needing to open it up every time you want to do something with it