Gas is the fee a blockchain charges to process a transaction (mint a #Name, send USDC, transfer an NFT). It varies with network congestion and the chain you are on. On hashtag.org, fiat checkouts and credits-based purchases hide gas from you — we cover or sponsor it. If you self-custody and transact on-chain directly, you pay gas yourself.
Web3 & crypto basics
Gas / gas fee
The network fee paid to validators to include a transaction on a blockchain.