in the context of value 4 value, they are a decentralized medium of exchange.

payment

donation

nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s how do you think of zaps?

Zaps can be tips, gratitude, payments (where the counter trade is trusted), or even vouchers (1 sat = 1 vote on a poll)