Hedera Hashgraph Protocol Explained - Creative Studio, Tech Blog - Colorless Identity
Hedera Hashgraph is a third-generation Distributed Ledger Technology (DLT) that aims to address the shortcomings of first and second-generation DLTs, namely Bitcoin and Etherium. Hedera Hashgraph uses a fundamentally different algorithm than those used by these earlier technologies, called Gossip about Gossip or simply "G2."
https://colorless.id/glossary/hedera-hashgraph-gossip-about-gossip-protocol-blockchain-alternative/