Let's talk about zero-knowledge proofs.
ZK Rollups use validity proofs to let the Ethereum mainnet verify that a batch of transactions was processed according to the rules.
One point worth thinking about further: verifying a zero-knowledge proof is usually much faster than redoing all the computations. That's why ZK Rollups can scale.
When you see a project claiming to “use ZK technology,” ask what it's actually used for—don't focus only on the buzzword.
$ZK is the token of the ZK Rollup network ZKsync.

Don't treat any of this as a buy or sell signal.