Gwei is a unit of measurement used to calculate the amount of gas required for a transaction to be processed on the Ethereum network. One Gwei is equivalent to 0.000000001 Ether (ETH).

For example, if a transaction requires a gas fee of 100 Gwei and the current price of Ether is $3,000, the transaction fee in USD would be $0.0003.

Gwei is used because gas fees on the Ethereum network can vary greatly depending on network congestion and demand for processing transactions. By setting the gas price in Gwei, users can ensure that their transactions are processed in a timely manner without overpaying for gas fees.

Gwei is also used as a reference for determining the minimum gas price required for a transaction to be included in a block. Ethereum miners prioritize transactions based on the gas price, so setting the right price can ensure that transactions are processed quickly.

Overall, Gwei is an important metric for Ethereum users to understand in order to navigate the network's transaction fees and ensure that their transactions are processed efficiently.

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